diff --git a/benchmarks/ssr/renderToStream.js b/benchmarks/ssr/renderToStream.js
index e068d94c6ac..6fbcfd20965 100644
--- a/benchmarks/ssr/renderToStream.js
+++ b/benchmarks/ssr/renderToStream.js
@@ -1,3 +1,5 @@
+/* eslint-disable no-unused-vars */
+
 'use strict'
 
 const Vue = require('../../dist/vue.runtime.common.js')
@@ -7,20 +9,21 @@ const gridComponent = require('./common.js')
 
 console.log('--- renderToStream --- ')
 const self = (global || root)
-self.s = self.performance.now()
+const s = self.performance.now()
 
 const stream = renderToStream(new Vue(gridComponent))
 let str = ''
-const stats = []
+let first
+let complete
+stream.once('data', () => {
+  first = self.performance.now() - s
+})
 stream.on('data', chunk => {
   str += chunk
-  stats.push(self.performance.now())
 })
 stream.on('end', () => {
-  stats.push(self.performance.now())
-  stats.forEach((val, index) => {
-    const type = index !== stats.length - 1 ? 'Chunk' : 'Complete'
-    console.log(type + ' time: ' + (val - self.s).toFixed(2) + 'ms')
-  })
+  complete = self.performance.now() - s
+  console.log(`first chunk: ${first.toFixed(2)}ms`)
+  console.log(`complete: ${complete.toFixed(2)}ms`)
   console.log()
 })
diff --git a/build/build.js b/build/build.js
index 5aee4484d4e..b9cb997e026 100644
--- a/build/build.js
+++ b/build/build.js
@@ -8,20 +8,6 @@ if (!fs.existsSync('dist')) {
   fs.mkdirSync('dist')
 }
 
-// Update main file
-const version = process.env.VERSION || require('../package.json').version
-const main = fs
-  .readFileSync('src/core/index.js', 'utf-8')
-  .replace(/Vue\.version = '[^']+'/, "Vue.version = '" + version + "'")
-fs.writeFileSync('src/core/index.js', main)
-
-// update weex subversion
-const weexVersion = process.env.WEEX_VERSION || require('../packages/weex-vue-framework/package.json').version
-const weexMain = fs
-  .readFileSync('src/entries/weex-framework.js', 'utf-8')
-  .replace(/Vue\.version = '[^']+'/, "Vue.version = '" + weexVersion + "'")
-fs.writeFileSync('src/entries/weex-framework.js', weexMain)
-
 let builds = require('./config').getAllBuilds()
 
 // filter builds via command line arg
diff --git a/build/config.js b/build/config.js
index 042c455dff7..026a962a597 100644
--- a/build/config.js
+++ b/build/config.js
@@ -4,6 +4,7 @@ const buble = require('rollup-plugin-buble')
 const replace = require('rollup-plugin-replace')
 const alias = require('rollup-plugin-alias')
 const version = process.env.VERSION || require('../package.json').version
+const weexVersion = process.env.WEEX_VERSION || require('../packages/weex-vue-framework/package.json').version
 
 const banner =
   '/*!\n' +
@@ -103,7 +104,9 @@ function genConfig (opts) {
     moduleName: 'Vue',
     plugins: [
       replace({
-        __WEEX__: !!opts.weex
+        __WEEX__: !!opts.weex,
+        __WEEX_VERSION__: weexVersion,
+        __VERSION__: version
       }),
       flow(),
       buble(),
diff --git a/build/karma.cover.config.js b/build/karma.cover.config.js
index c030035709c..c70a8ec5f64 100644
--- a/build/karma.cover.config.js
+++ b/build/karma.cover.config.js
@@ -15,8 +15,8 @@ module.exports = function (config) {
 
   // add babel-plugin-coverage for code intrumentation
   options.webpack.babel = {
-    plugins: [['coverage', {
-      ignore: [
+    plugins: [['istanbul', {
+      exclude: [
         'test/',
         'src/compiler/parser/html-parser.js',
         'src/core/instance/proxy.js',
diff --git a/dist/vue.common.js b/dist/vue.common.js
index 90b74248546..6c89462f960 100644
--- a/dist/vue.common.js
+++ b/dist/vue.common.js
@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
@@ -196,6 +196,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -276,6 +281,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -485,10 +495,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -706,9 +716,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -1174,11 +1183,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -1380,6 +1392,7 @@ var util = Object.freeze({
 	toObject: toObject,
 	noop: noop,
 	no: no,
+	identity: identity,
 	genStaticKeys: genStaticKeys,
 	looseEqual: looseEqual,
 	looseIndexOf: looseIndexOf,
@@ -1876,7 +1889,8 @@ function initData (vm) {
   if (!isPlainObject(data)) {
     data = {};
     process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     );
   }
@@ -2052,7 +2066,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -2061,7 +2074,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -2076,13 +2089,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -2094,10 +2111,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -2114,167 +2131,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-function mergeVNodeHook (def, hookKey, hook, key) {
-  key = key + hookKey;
-  var injectedHash = def.__injected || (def.__injected = {});
-  if (!injectedHash[key]) {
-    injectedHash[key] = true;
-    var oldHook = def[hookKey];
-    if (oldHook) {
-      def[hookKey] = function () {
-        oldHook.apply(this, arguments);
-        hook.apply(this, arguments);
-      };
-    } else {
-      def[hookKey] = hook;
-    }
-  }
-}
-
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
-}
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm) {
@@ -2310,7 +2166,7 @@ function lifecycleMixin (Vue) {
     var vm = this;
     vm.$el = el;
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode;
+      vm.$options.render = createEmptyVNode;
       if (process.env.NODE_ENV !== 'production') {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -2561,7 +2417,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -2581,19 +2437,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind$1(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -2804,26 +2658,172 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+function mergeVNodeHook (def, hookKey, hook, key) {
+  key = key + hookKey;
+  var injectedHash = def.__injected || (def.__injected = {});
+  if (!injectedHash[key]) {
+    injectedHash[key] = true;
+    var oldHook = def[hookKey];
+    if (oldHook) {
+      def[hookKey] = function () {
+        oldHook.apply(this, arguments);
+        hook.apply(this, arguments);
+      };
+    } else {
+      def[hookKey] = hook;
+    }
+  }
+}
+
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
+}
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     process.env.NODE_ENV !== 'production' && warn(
@@ -2831,11 +2831,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -2844,31 +2844,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -2882,9 +2904,14 @@ function initRender (vm) {
   var renderContext = parentVnode && parentVnode.context;
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext);
   vm.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind$1(createElement, vm);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
   if (vm.$options.el) {
     vm.$mount(vm.$options.el);
   }
@@ -2945,21 +2972,21 @@ function renderMixin (Vue) {
           vm
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -3013,7 +3040,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -3117,14 +3143,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -3380,7 +3405,8 @@ function initExtend (Vue) {
       if (!/^[a-zA-Z][\w-]*$/.test(name)) {
         warn(
           'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characaters and the hyphen.'
+          'can only contain alphanumeric characters and the hyphen, ' +
+          'and must start with a letter.'
         );
       }
     }
@@ -3561,14 +3587,15 @@ Object.defineProperty(Vue$3.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Vue$3.version = '2.1.4';
+Vue$3.version = '2.1.5';
 
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
@@ -3818,10 +3845,6 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function childNodes (node) {
-  return node.childNodes
-}
-
 function setAttribute (node, key, val) {
   node.setAttribute(key, val);
 }
@@ -3839,7 +3862,6 @@ var nodeOps = Object.freeze({
 	nextSibling: nextSibling,
 	tagName: tagName,
 	setTextContent: setTextContent,
-	childNodes: childNodes,
 	setAttribute: setAttribute
 });
 
@@ -4067,7 +4089,11 @@ function createPatchFunction (backend) {
 
   function insert (parent, elm, ref) {
     if (parent) {
-      nodeOps.insertBefore(parent, elm, ref);
+      if (ref) {
+        nodeOps.insertBefore(parent, elm, ref);
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
     }
   }
 
@@ -4247,15 +4273,15 @@ function createPatchFunction (backend) {
               'Make sure each v-for item has a unique key.'
             );
           }
-          if (elmToMove.tag !== newStartVnode.tag) {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
+          if (sameVnode(elmToMove, newStartVnode)) {
             patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm);
             newStartVnode = newCh[++newStartIdx];
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            newStartVnode = newCh[++newStartIdx];
           }
         }
       }
@@ -4329,6 +4355,11 @@ function createPatchFunction (backend) {
   }
 
   var bailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue) {
     if (process.env.NODE_ENV !== 'production') {
       if (!assertNodeMatch(elm, vnode)) {
@@ -4349,36 +4380,40 @@ function createPatchFunction (backend) {
     }
     if (isDef(tag)) {
       if (isDef(children)) {
-        var childNodes = nodeOps.childNodes(elm);
         // empty element, allow client to pick up and populate children
-        if (!childNodes.length) {
+        if (!elm.hasChildNodes()) {
           createChildren(vnode, children, insertedVnodeQueue);
         } else {
           var childrenMatch = true;
-          if (childNodes.length !== children.length) {
-            childrenMatch = false;
-          } else {
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!hydrate(childNodes[i$1], children[i$1], insertedVnodeQueue)) {
-                childrenMatch = false;
-                break
-              }
+          var childNode = elm.firstChild;
+          for (var i$1 = 0; i$1 < children.length; i$1++) {
+            if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
+              childrenMatch = false;
+              break
             }
+            childNode = childNode.nextSibling;
           }
-          if (!childrenMatch) {
+          // if childNode is not null, it means the actual childNodes list is
+          // longer than the virtual children list.
+          if (!childrenMatch || childNode) {
             if (process.env.NODE_ENV !== 'production' &&
                 typeof console !== 'undefined' &&
                 !bailed) {
               bailed = true;
               console.warn('Parent: ', elm);
-              console.warn('Mismatching childNodes vs. VNodes: ', childNodes, children);
+              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
             }
             return false
           }
         }
       }
       if (isDef(data)) {
-        invokeCreateHooks(vnode, insertedVnodeQueue);
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
       }
     }
     return true
@@ -4388,7 +4423,7 @@ function createPatchFunction (backend) {
     if (vnode.tag) {
       return (
         vnode.tag.indexOf('vue-component') === 0 ||
-        vnode.tag.toLowerCase() === nodeOps.tagName(node).toLowerCase()
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
       )
     } else {
       return _toString(vnode.text) === node.data
@@ -4485,13 +4520,13 @@ var directives = {
   }
 };
 
-function updateDirectives (
-  oldVnode,
-  vnode
-) {
-  if (!oldVnode.data.directives && !vnode.data.directives) {
-    return
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
   }
+}
+
+function _update (oldVnode, vnode) {
   var isCreate = oldVnode === emptyNode;
   var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
   var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
@@ -4521,9 +4556,9 @@ function updateDirectives (
 
   if (dirsWithInsert.length) {
     var callInsert = function () {
-      dirsWithInsert.forEach(function (dir) {
-        callHook$1(dir, 'inserted', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
     };
     if (isCreate) {
       mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert, 'dir-insert');
@@ -4534,9 +4569,9 @@ function updateDirectives (
 
   if (dirsWithPostpatch.length) {
     mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
-      dirsWithPostpatch.forEach(function (dir) {
-        callHook$1(dir, 'componentUpdated', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
     }, 'dir-postpatch');
   }
 
@@ -4610,6 +4645,11 @@ function updateAttrs (oldVnode, vnode) {
       setAttr(elm, key, cur);
     }
   }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  /* istanbul ignore if */
+  if (isIE9 && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
   for (key in oldAttrs) {
     if (attrs[key] == null) {
       if (isXlink(key)) {
@@ -4683,8 +4723,26 @@ var klass = {
   update: updateClass
 };
 
-// skip type checking this file because we need to attach private properties
-// to elements
+/*  */
+
+var target;
+
+function add$1 (event, handler, once, capture) {
+  if (once) {
+    var oldHandler = handler;
+    handler = function (ev) {
+      remove$2(event, handler, capture);
+      arguments.length === 1
+        ? oldHandler(ev)
+        : oldHandler.apply(null, arguments);
+    };
+  }
+  target.addEventListener(event, handler, capture);
+}
+
+function remove$2 (event, handler, capture) {
+  target.removeEventListener(event, handler, capture);
+}
 
 function updateDOMListeners (oldVnode, vnode) {
   if (!oldVnode.data.on && !vnode.data.on) {
@@ -4692,26 +4750,8 @@ function updateDOMListeners (oldVnode, vnode) {
   }
   var on = vnode.data.on || {};
   var oldOn = oldVnode.data.on || {};
-  var add = vnode.elm._v_add || (
-    vnode.elm._v_add = function (event, handler, once, capture) {
-      if (once) {
-        var oldHandler = handler;
-        handler = function (ev) {
-          remove(event, handler, capture);
-          arguments.length === 1
-            ? oldHandler(ev)
-            : oldHandler.apply(null, arguments);
-        };
-      }
-      vnode.elm.addEventListener(event, handler, capture);
-    }
-  );
-  var remove = vnode.elm._v_remove || (
-    vnode.elm._v_remove = function (event, handler, capture) {
-      vnode.elm.removeEventListener(event, handler, capture);
-    }
-  );
-  updateListeners(on, oldOn, add, remove, vnode.context);
+  target = vnode.elm;
+  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
 }
 
 var events = {
@@ -4754,7 +4794,10 @@ function updateDOMProps (oldVnode, vnode) {
       elm._value = cur;
       // avoid resetting cursor position when value is the same
       var strCur = cur == null ? '' : String(cur);
-      if (elm.value !== strCur && !elm.composing) {
+      if (!elm.composing && (
+        (document.activeElement !== elm && elm.value !== strCur) ||
+        isValueChanged(vnode, strCur)
+      )) {
         elm.value = strCur;
       }
     } else {
@@ -4763,6 +4806,18 @@ function updateDOMProps (oldVnode, vnode) {
   }
 }
 
+function isValueChanged (vnode, newVal) {
+  var value = vnode.elm.value;
+  var modifiers = vnode.elm._vModifiers; // injected by v-model runtime
+  if ((modifiers && modifiers.number) || vnode.elm.type === 'number') {
+    return toNumber(value) !== toNumber(newVal)
+  }
+  if (modifiers && modifiers.trim) {
+    return value.trim() !== newVal.trim()
+  }
+  return value !== newVal
+}
+
 var domProps = {
   create: updateDOMProps,
   update: updateDOMProps
@@ -5107,7 +5162,7 @@ function toMs (s) {
 
 /*  */
 
-function enter (vnode) {
+function enter (vnode, toggleDisplay) {
   var el = vnode.elm;
 
   // call leave callback now
@@ -5216,6 +5271,7 @@ function enter (vnode) {
   }
 
   if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
     enterHook && enterHook(el, cb);
   }
 
@@ -5425,17 +5481,17 @@ var model = {
       if (isIE || isEdge) {
         setTimeout(cb, 0);
       }
-    } else if (
-      (vnode.tag === 'textarea' || el.type === 'text') &&
-      !binding.modifiers.lazy
-    ) {
-      if (!isAndroid) {
-        el.addEventListener('compositionstart', onCompositionStart);
-        el.addEventListener('compositionend', onCompositionEnd);
-      }
-      /* istanbul ignore if */
-      if (isIE9) {
-        el.vmodel = true;
+    } else if (vnode.tag === 'textarea' || el.type === 'text') {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+        }
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
       }
     }
   },
@@ -5534,12 +5590,16 @@ var show = {
 
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
     if (value && transition && !isIE9) {
-      enter(vnode);
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
     }
-    var originalDisplay = el.style.display === 'none' ? '' : el.style.display;
-    el.style.display = value ? originalDisplay : 'none';
-    el.__vOriginalDisplay = originalDisplay;
   },
   update: function update (el, ref, vnode) {
     var value = ref.value;
@@ -5550,9 +5610,11 @@ var show = {
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
     if (transition && !isIE9) {
+      vnode.data.show = true;
       if (value) {
-        enter(vnode);
-        el.style.display = el.__vOriginalDisplay;
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
       } else {
         leave(vnode, function () {
           el.style.display = 'none';
@@ -5924,7 +5986,7 @@ setTimeout(function () {
       devtools.emit('init', Vue$3);
     } else if (
       process.env.NODE_ENV !== 'production' &&
-      inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)
+      inBrowser && !isEdge && /Chrome\/\d+/.test(window.navigator.userAgent)
     ) {
       console.log(
         'Download the Vue Devtools for a better development experience:\n' +
@@ -6337,7 +6399,6 @@ function parseFilters (exp) {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
-        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [
@@ -6345,6 +6406,18 @@ function parseFilters (exp) {
         case 0x7B: curly++; break                 // {
         case 0x7D: curly--; break                 // }
       }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !/[\w$]/.test(p)) {
+          inRegex = true;
+        }
+      }
     }
   }
 
@@ -7007,6 +7080,7 @@ function processAttrs (el) {
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
+        isProp = false;
         if (modifiers) {
           if (modifiers.prop) {
             isProp = true;
@@ -7376,7 +7450,7 @@ function generate (
   transforms$1 = pluckModuleFunction(options.modules, 'transformCode');
   dataGenFns = pluckModuleFunction(options.modules, 'genData');
   platformDirectives$1 = options.directives || {};
-  var code = ast ? genElement(ast) : '_h("div")';
+  var code = ast ? genElement(ast) : '_c("div")';
   staticRenderFns = prevStaticRenderFns;
   onceCount = prevOnceCount;
   return {
@@ -7406,8 +7480,8 @@ function genElement (el) {
     } else {
       var data = el.plain ? undefined : genData(el);
 
-      var children = el.inlineTemplate ? null : genChildren(el);
-      code = "_h('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      var children = el.inlineTemplate ? null : genChildren(el, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
     }
     // module transforms
     for (var i = 0; i < transforms$1.length; i++) {
@@ -7604,12 +7678,34 @@ function genScopedSlot (key, el) {
       : genElement(el)) + "}"
 }
 
-function genChildren (el) {
-  if (el.children.length) {
-    return '[' + el.children.map(genNode).join(',') + ']'
+function genChildren (el, checkSkip) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot') {
+      return genElement(el$1)
+    }
+    return ("[" + (children.map(genNode).join(',')) + "]" + (checkSkip
+        ? canSkipNormalization(children) ? '' : ',true'
+        : ''))
   }
 }
 
+function canSkipNormalization (children) {
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.for || el.tag === 'template' || el.tag === 'slot' ||
+      (el.if && el.ifConditions.some(function (c) { return c.tag === 'template'; }))) {
+      return false
+    }
+  }
+  return true
+}
+
 function genNode (node) {
   if (node.type === 1) {
     return genElement(node)
@@ -7619,9 +7715,9 @@ function genNode (node) {
 }
 
 function genText (text) {
-  return text.type === 2
+  return ("_v(" + (text.type === 2
     ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
 }
 
 function genSlot (el) {
@@ -7632,8 +7728,8 @@ function genSlot (el) {
 
 // componentName is el.component, take it as argument to shun flow's pessimistic refinement
 function genComponent (componentName, el) {
-  var children = el.inlineTemplate ? null : genChildren(el);
-  return ("_h(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
+  var children = el.inlineTemplate ? null : genChildren(el, true);
+  return ("_c(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
 }
 
 function genProps (props) {
@@ -7966,10 +8062,12 @@ function genDefaultModel (
   valueExpression = number || type === 'number'
     ? ("_n(" + valueExpression + ")")
     : valueExpression;
+
   var code = genAssignmentCode(value, valueExpression);
   if (isNative && needCompositionGuard) {
     code = "if($event.target.composing)return;" + code;
   }
+
   // inputs with type="file" are read only and setting the input's
   // value will throw an error.
   if (process.env.NODE_ENV !== 'production' &&
@@ -7979,8 +8077,12 @@ function genDefaultModel (
       "File inputs are read only. Use a v-on:change listener instead."
     );
   }
+
   addProp(el, 'value', isNative ? ("_s(" + value + ")") : ("(" + value + ")"));
   addHandler(el, event, code, null, true);
+  if (trim || number || type === 'number') {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
 }
 
 function genSelect (
diff --git a/dist/vue.js b/dist/vue.js
index 67d4c5c2470..35873500b13 100644
--- a/dist/vue.js
+++ b/dist/vue.js
@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
@@ -200,6 +200,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -280,6 +285,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -489,10 +499,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -710,9 +720,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -1178,11 +1187,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if ("development" !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -1384,6 +1396,7 @@ var util = Object.freeze({
 	toObject: toObject,
 	noop: noop,
 	no: no,
+	identity: identity,
 	genStaticKeys: genStaticKeys,
 	looseEqual: looseEqual,
 	looseIndexOf: looseIndexOf,
@@ -1878,7 +1891,8 @@ function initData (vm) {
   if (!isPlainObject(data)) {
     data = {};
     "development" !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     );
   }
@@ -2054,7 +2068,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -2063,7 +2076,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -2078,13 +2091,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -2096,10 +2113,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -2116,167 +2133,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-function mergeVNodeHook (def, hookKey, hook, key) {
-  key = key + hookKey;
-  var injectedHash = def.__injected || (def.__injected = {});
-  if (!injectedHash[key]) {
-    injectedHash[key] = true;
-    var oldHook = def[hookKey];
-    if (oldHook) {
-      def[hookKey] = function () {
-        oldHook.apply(this, arguments);
-        hook.apply(this, arguments);
-      };
-    } else {
-      def[hookKey] = hook;
-    }
-  }
-}
-
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      "development" !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
-}
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm) {
@@ -2312,7 +2168,7 @@ function lifecycleMixin (Vue) {
     var vm = this;
     vm.$el = el;
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode;
+      vm.$options.render = createEmptyVNode;
       {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -2563,7 +2419,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -2583,19 +2439,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind$1(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -2806,26 +2660,172 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+function mergeVNodeHook (def, hookKey, hook, key) {
+  key = key + hookKey;
+  var injectedHash = def.__injected || (def.__injected = {});
+  if (!injectedHash[key]) {
+    injectedHash[key] = true;
+    var oldHook = def[hookKey];
+    if (oldHook) {
+      def[hookKey] = function () {
+        oldHook.apply(this, arguments);
+        hook.apply(this, arguments);
+      };
+    } else {
+      def[hookKey] = hook;
+    }
+  }
+}
+
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      "development" !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
+}
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     "development" !== 'production' && warn(
@@ -2833,11 +2833,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -2846,31 +2846,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -2884,9 +2906,14 @@ function initRender (vm) {
   var renderContext = parentVnode && parentVnode.context;
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext);
   vm.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind$1(createElement, vm);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
   if (vm.$options.el) {
     vm.$mount(vm.$options.el);
   }
@@ -2947,21 +2974,21 @@ function renderMixin (Vue) {
           vm
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -3015,7 +3042,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -3119,14 +3145,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -3380,7 +3405,8 @@ function initExtend (Vue) {
       if (!/^[a-zA-Z][\w-]*$/.test(name)) {
         warn(
           'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characaters and the hyphen.'
+          'can only contain alphanumeric characters and the hyphen, ' +
+          'and must start with a letter.'
         );
       }
     }
@@ -3561,14 +3587,15 @@ Object.defineProperty(Vue$3.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Vue$3.version = '2.1.4';
+Vue$3.version = '2.1.5';
 
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
@@ -3818,10 +3845,6 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function childNodes (node) {
-  return node.childNodes
-}
-
 function setAttribute (node, key, val) {
   node.setAttribute(key, val);
 }
@@ -3839,7 +3862,6 @@ var nodeOps = Object.freeze({
 	nextSibling: nextSibling,
 	tagName: tagName,
 	setTextContent: setTextContent,
-	childNodes: childNodes,
 	setAttribute: setAttribute
 });
 
@@ -4067,7 +4089,11 @@ function createPatchFunction (backend) {
 
   function insert (parent, elm, ref) {
     if (parent) {
-      nodeOps.insertBefore(parent, elm, ref);
+      if (ref) {
+        nodeOps.insertBefore(parent, elm, ref);
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
     }
   }
 
@@ -4247,15 +4273,15 @@ function createPatchFunction (backend) {
               'Make sure each v-for item has a unique key.'
             );
           }
-          if (elmToMove.tag !== newStartVnode.tag) {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
+          if (sameVnode(elmToMove, newStartVnode)) {
             patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm);
             newStartVnode = newCh[++newStartIdx];
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            newStartVnode = newCh[++newStartIdx];
           }
         }
       }
@@ -4329,6 +4355,11 @@ function createPatchFunction (backend) {
   }
 
   var bailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue) {
     {
       if (!assertNodeMatch(elm, vnode)) {
@@ -4349,36 +4380,40 @@ function createPatchFunction (backend) {
     }
     if (isDef(tag)) {
       if (isDef(children)) {
-        var childNodes = nodeOps.childNodes(elm);
         // empty element, allow client to pick up and populate children
-        if (!childNodes.length) {
+        if (!elm.hasChildNodes()) {
           createChildren(vnode, children, insertedVnodeQueue);
         } else {
           var childrenMatch = true;
-          if (childNodes.length !== children.length) {
-            childrenMatch = false;
-          } else {
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!hydrate(childNodes[i$1], children[i$1], insertedVnodeQueue)) {
-                childrenMatch = false;
-                break
-              }
+          var childNode = elm.firstChild;
+          for (var i$1 = 0; i$1 < children.length; i$1++) {
+            if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
+              childrenMatch = false;
+              break
             }
+            childNode = childNode.nextSibling;
           }
-          if (!childrenMatch) {
+          // if childNode is not null, it means the actual childNodes list is
+          // longer than the virtual children list.
+          if (!childrenMatch || childNode) {
             if ("development" !== 'production' &&
                 typeof console !== 'undefined' &&
                 !bailed) {
               bailed = true;
               console.warn('Parent: ', elm);
-              console.warn('Mismatching childNodes vs. VNodes: ', childNodes, children);
+              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
             }
             return false
           }
         }
       }
       if (isDef(data)) {
-        invokeCreateHooks(vnode, insertedVnodeQueue);
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
       }
     }
     return true
@@ -4388,7 +4423,7 @@ function createPatchFunction (backend) {
     if (vnode.tag) {
       return (
         vnode.tag.indexOf('vue-component') === 0 ||
-        vnode.tag.toLowerCase() === nodeOps.tagName(node).toLowerCase()
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
       )
     } else {
       return _toString(vnode.text) === node.data
@@ -4485,13 +4520,13 @@ var directives = {
   }
 };
 
-function updateDirectives (
-  oldVnode,
-  vnode
-) {
-  if (!oldVnode.data.directives && !vnode.data.directives) {
-    return
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
   }
+}
+
+function _update (oldVnode, vnode) {
   var isCreate = oldVnode === emptyNode;
   var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
   var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
@@ -4521,9 +4556,9 @@ function updateDirectives (
 
   if (dirsWithInsert.length) {
     var callInsert = function () {
-      dirsWithInsert.forEach(function (dir) {
-        callHook$1(dir, 'inserted', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
     };
     if (isCreate) {
       mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert, 'dir-insert');
@@ -4534,9 +4569,9 @@ function updateDirectives (
 
   if (dirsWithPostpatch.length) {
     mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
-      dirsWithPostpatch.forEach(function (dir) {
-        callHook$1(dir, 'componentUpdated', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
     }, 'dir-postpatch');
   }
 
@@ -4610,6 +4645,11 @@ function updateAttrs (oldVnode, vnode) {
       setAttr(elm, key, cur);
     }
   }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  /* istanbul ignore if */
+  if (isIE9 && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
   for (key in oldAttrs) {
     if (attrs[key] == null) {
       if (isXlink(key)) {
@@ -4683,8 +4723,26 @@ var klass = {
   update: updateClass
 };
 
-// skip type checking this file because we need to attach private properties
-// to elements
+/*  */
+
+var target;
+
+function add$1 (event, handler, once, capture) {
+  if (once) {
+    var oldHandler = handler;
+    handler = function (ev) {
+      remove$2(event, handler, capture);
+      arguments.length === 1
+        ? oldHandler(ev)
+        : oldHandler.apply(null, arguments);
+    };
+  }
+  target.addEventListener(event, handler, capture);
+}
+
+function remove$2 (event, handler, capture) {
+  target.removeEventListener(event, handler, capture);
+}
 
 function updateDOMListeners (oldVnode, vnode) {
   if (!oldVnode.data.on && !vnode.data.on) {
@@ -4692,26 +4750,8 @@ function updateDOMListeners (oldVnode, vnode) {
   }
   var on = vnode.data.on || {};
   var oldOn = oldVnode.data.on || {};
-  var add = vnode.elm._v_add || (
-    vnode.elm._v_add = function (event, handler, once, capture) {
-      if (once) {
-        var oldHandler = handler;
-        handler = function (ev) {
-          remove(event, handler, capture);
-          arguments.length === 1
-            ? oldHandler(ev)
-            : oldHandler.apply(null, arguments);
-        };
-      }
-      vnode.elm.addEventListener(event, handler, capture);
-    }
-  );
-  var remove = vnode.elm._v_remove || (
-    vnode.elm._v_remove = function (event, handler, capture) {
-      vnode.elm.removeEventListener(event, handler, capture);
-    }
-  );
-  updateListeners(on, oldOn, add, remove, vnode.context);
+  target = vnode.elm;
+  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
 }
 
 var events = {
@@ -4754,7 +4794,10 @@ function updateDOMProps (oldVnode, vnode) {
       elm._value = cur;
       // avoid resetting cursor position when value is the same
       var strCur = cur == null ? '' : String(cur);
-      if (elm.value !== strCur && !elm.composing) {
+      if (!elm.composing && (
+        (document.activeElement !== elm && elm.value !== strCur) ||
+        isValueChanged(vnode, strCur)
+      )) {
         elm.value = strCur;
       }
     } else {
@@ -4763,6 +4806,18 @@ function updateDOMProps (oldVnode, vnode) {
   }
 }
 
+function isValueChanged (vnode, newVal) {
+  var value = vnode.elm.value;
+  var modifiers = vnode.elm._vModifiers; // injected by v-model runtime
+  if ((modifiers && modifiers.number) || vnode.elm.type === 'number') {
+    return toNumber(value) !== toNumber(newVal)
+  }
+  if (modifiers && modifiers.trim) {
+    return value.trim() !== newVal.trim()
+  }
+  return value !== newVal
+}
+
 var domProps = {
   create: updateDOMProps,
   update: updateDOMProps
@@ -5107,7 +5162,7 @@ function toMs (s) {
 
 /*  */
 
-function enter (vnode) {
+function enter (vnode, toggleDisplay) {
   var el = vnode.elm;
 
   // call leave callback now
@@ -5216,6 +5271,7 @@ function enter (vnode) {
   }
 
   if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
     enterHook && enterHook(el, cb);
   }
 
@@ -5425,17 +5481,17 @@ var model = {
       if (isIE || isEdge) {
         setTimeout(cb, 0);
       }
-    } else if (
-      (vnode.tag === 'textarea' || el.type === 'text') &&
-      !binding.modifiers.lazy
-    ) {
-      if (!isAndroid) {
-        el.addEventListener('compositionstart', onCompositionStart);
-        el.addEventListener('compositionend', onCompositionEnd);
-      }
-      /* istanbul ignore if */
-      if (isIE9) {
-        el.vmodel = true;
+    } else if (vnode.tag === 'textarea' || el.type === 'text') {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+        }
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
       }
     }
   },
@@ -5534,12 +5590,16 @@ var show = {
 
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
     if (value && transition && !isIE9) {
-      enter(vnode);
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
     }
-    var originalDisplay = el.style.display === 'none' ? '' : el.style.display;
-    el.style.display = value ? originalDisplay : 'none';
-    el.__vOriginalDisplay = originalDisplay;
   },
   update: function update (el, ref, vnode) {
     var value = ref.value;
@@ -5550,9 +5610,11 @@ var show = {
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
     if (transition && !isIE9) {
+      vnode.data.show = true;
       if (value) {
-        enter(vnode);
-        el.style.display = el.__vOriginalDisplay;
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
       } else {
         leave(vnode, function () {
           el.style.display = 'none';
@@ -5924,7 +5986,7 @@ setTimeout(function () {
       devtools.emit('init', Vue$3);
     } else if (
       "development" !== 'production' &&
-      inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)
+      inBrowser && !isEdge && /Chrome\/\d+/.test(window.navigator.userAgent)
     ) {
       console.log(
         'Download the Vue Devtools for a better development experience:\n' +
@@ -6337,7 +6399,6 @@ function parseFilters (exp) {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
-        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [
@@ -6345,6 +6406,18 @@ function parseFilters (exp) {
         case 0x7B: curly++; break                 // {
         case 0x7D: curly--; break                 // }
       }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !/[\w$]/.test(p)) {
+          inRegex = true;
+        }
+      }
     }
   }
 
@@ -7007,6 +7080,7 @@ function processAttrs (el) {
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
+        isProp = false;
         if (modifiers) {
           if (modifiers.prop) {
             isProp = true;
@@ -7376,7 +7450,7 @@ function generate (
   transforms$1 = pluckModuleFunction(options.modules, 'transformCode');
   dataGenFns = pluckModuleFunction(options.modules, 'genData');
   platformDirectives$1 = options.directives || {};
-  var code = ast ? genElement(ast) : '_h("div")';
+  var code = ast ? genElement(ast) : '_c("div")';
   staticRenderFns = prevStaticRenderFns;
   onceCount = prevOnceCount;
   return {
@@ -7406,8 +7480,8 @@ function genElement (el) {
     } else {
       var data = el.plain ? undefined : genData(el);
 
-      var children = el.inlineTemplate ? null : genChildren(el);
-      code = "_h('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      var children = el.inlineTemplate ? null : genChildren(el, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
     }
     // module transforms
     for (var i = 0; i < transforms$1.length; i++) {
@@ -7604,12 +7678,34 @@ function genScopedSlot (key, el) {
       : genElement(el)) + "}"
 }
 
-function genChildren (el) {
-  if (el.children.length) {
-    return '[' + el.children.map(genNode).join(',') + ']'
+function genChildren (el, checkSkip) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot') {
+      return genElement(el$1)
+    }
+    return ("[" + (children.map(genNode).join(',')) + "]" + (checkSkip
+        ? canSkipNormalization(children) ? '' : ',true'
+        : ''))
   }
 }
 
+function canSkipNormalization (children) {
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.for || el.tag === 'template' || el.tag === 'slot' ||
+      (el.if && el.ifConditions.some(function (c) { return c.tag === 'template'; }))) {
+      return false
+    }
+  }
+  return true
+}
+
 function genNode (node) {
   if (node.type === 1) {
     return genElement(node)
@@ -7619,9 +7715,9 @@ function genNode (node) {
 }
 
 function genText (text) {
-  return text.type === 2
+  return ("_v(" + (text.type === 2
     ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
 }
 
 function genSlot (el) {
@@ -7632,8 +7728,8 @@ function genSlot (el) {
 
 // componentName is el.component, take it as argument to shun flow's pessimistic refinement
 function genComponent (componentName, el) {
-  var children = el.inlineTemplate ? null : genChildren(el);
-  return ("_h(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
+  var children = el.inlineTemplate ? null : genChildren(el, true);
+  return ("_c(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
 }
 
 function genProps (props) {
@@ -7966,10 +8062,12 @@ function genDefaultModel (
   valueExpression = number || type === 'number'
     ? ("_n(" + valueExpression + ")")
     : valueExpression;
+
   var code = genAssignmentCode(value, valueExpression);
   if (isNative && needCompositionGuard) {
     code = "if($event.target.composing)return;" + code;
   }
+
   // inputs with type="file" are read only and setting the input's
   // value will throw an error.
   if ("development" !== 'production' &&
@@ -7979,8 +8077,12 @@ function genDefaultModel (
       "File inputs are read only. Use a v-on:change listener instead."
     );
   }
+
   addProp(el, 'value', isNative ? ("_s(" + value + ")") : ("(" + value + ")"));
   addHandler(el, event, code, null, true);
+  if (trim || number || type === 'number') {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
 }
 
 function genSelect (
diff --git a/dist/vue.min.js b/dist/vue.min.js
index 12fc623b5e9..9cc44cec9c9 100644
--- a/dist/vue.min.js
+++ b/dist/vue.min.js
@@ -1,8 +1,8 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):e.Vue=t()}(this,function(){"use strict";function e(e){return null==e?"":"object"==typeof e?JSON.stringify(e,null,2):String(e)}function t(e){var t=parseFloat(e,10);return t||0===t?t:e}function n(e,t){for(var n=Object.create(null),r=e.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return t?function(e){return n[e.toLowerCase()]}:function(e){return n[e]}}function r(e,t){if(e.length){var n=e.indexOf(t);if(n>-1)return e.splice(n,1)}}function i(e,t){return Br.call(e,t)}function o(e){return"string"==typeof e||"number"==typeof e}function a(e){var t=Object.create(null);return function(n){var r=t[n];return r||(t[n]=e(n))}}function s(e,t){function n(n){var r=arguments.length;return r?r>1?e.apply(t,arguments):e.call(t,n):e.call(t)}return n._length=e.length,n}function c(e,t){t=t||0;for(var n=e.length-t,r=new Array(n);n--;)r[n]=e[n+t];return r}function l(e,t){for(var n in t)e[n]=t[n];return e}function u(e){return null!==e&&"object"==typeof e}function f(e){return Wr.call(e)===Zr}function d(e){for(var t={},n=0;n<e.length;n++)e[n]&&l(t,e[n]);return t}function p(){}function v(e){return e.reduce(function(e,t){return e.concat(t.staticKeys||[])},[]).join(",")}function h(e,t){return e==t||!(!u(e)||!u(t))&&JSON.stringify(e)===JSON.stringify(t)}function m(e,t){for(var n=0;n<e.length;n++)if(h(e[n],t))return n;return-1}function g(e){var t=(e+"").charCodeAt(0);return 36===t||95===t}function y(e,t,n,r){Object.defineProperty(e,t,{value:n,enumerable:!!r,writable:!0,configurable:!0})}function _(e){if(!Qr.test(e)){var t=e.split(".");return function(e){for(var n=0;n<t.length;n++){if(!e)return;e=e[t[n]]}return e}}}function b(e){return/native code/.test(e.toString())}function $(e){pi.target&&vi.push(pi.target),pi.target=e}function w(){pi.target=vi.pop()}function x(e,t){e.__proto__=t}function C(e,t,n){for(var r=0,i=n.length;r<i;r++){var o=n[r];y(e,o,t[o])}}function 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diff --git a/dist/vue.runtime.common.js b/dist/vue.runtime.common.js
index aed7b7f8af8..1b853ecc5b8 100644
--- a/dist/vue.runtime.common.js
+++ b/dist/vue.runtime.common.js
@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
@@ -196,6 +196,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -276,6 +281,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -485,10 +495,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -706,9 +716,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -1174,11 +1183,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -1380,6 +1392,7 @@ var util = Object.freeze({
 	toObject: toObject,
 	noop: noop,
 	no: no,
+	identity: identity,
 	genStaticKeys: genStaticKeys,
 	looseEqual: looseEqual,
 	looseIndexOf: looseIndexOf,
@@ -1876,7 +1889,8 @@ function initData (vm) {
   if (!isPlainObject(data)) {
     data = {};
     process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     );
   }
@@ -2052,7 +2066,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -2061,7 +2074,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -2076,13 +2089,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -2094,10 +2111,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -2114,167 +2131,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-function mergeVNodeHook (def, hookKey, hook, key) {
-  key = key + hookKey;
-  var injectedHash = def.__injected || (def.__injected = {});
-  if (!injectedHash[key]) {
-    injectedHash[key] = true;
-    var oldHook = def[hookKey];
-    if (oldHook) {
-      def[hookKey] = function () {
-        oldHook.apply(this, arguments);
-        hook.apply(this, arguments);
-      };
-    } else {
-      def[hookKey] = hook;
-    }
-  }
-}
-
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
-}
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm) {
@@ -2310,7 +2166,7 @@ function lifecycleMixin (Vue) {
     var vm = this;
     vm.$el = el;
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode;
+      vm.$options.render = createEmptyVNode;
       if (process.env.NODE_ENV !== 'production') {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -2561,7 +2417,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -2581,19 +2437,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind$1(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -2804,26 +2658,172 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+function mergeVNodeHook (def, hookKey, hook, key) {
+  key = key + hookKey;
+  var injectedHash = def.__injected || (def.__injected = {});
+  if (!injectedHash[key]) {
+    injectedHash[key] = true;
+    var oldHook = def[hookKey];
+    if (oldHook) {
+      def[hookKey] = function () {
+        oldHook.apply(this, arguments);
+        hook.apply(this, arguments);
+      };
+    } else {
+      def[hookKey] = hook;
+    }
+  }
+}
+
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
+}
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     process.env.NODE_ENV !== 'production' && warn(
@@ -2831,11 +2831,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -2844,31 +2844,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -2882,9 +2904,14 @@ function initRender (vm) {
   var renderContext = parentVnode && parentVnode.context;
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext);
   vm.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind$1(createElement, vm);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
   if (vm.$options.el) {
     vm.$mount(vm.$options.el);
   }
@@ -2945,21 +2972,21 @@ function renderMixin (Vue) {
           vm
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -3013,7 +3040,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -3117,14 +3143,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -3380,7 +3405,8 @@ function initExtend (Vue) {
       if (!/^[a-zA-Z][\w-]*$/.test(name)) {
         warn(
           'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characaters and the hyphen.'
+          'can only contain alphanumeric characters and the hyphen, ' +
+          'and must start with a letter.'
         );
       }
     }
@@ -3561,14 +3587,15 @@ Object.defineProperty(Vue$2.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Vue$2.version = '2.1.4';
+Vue$2.version = '2.1.5';
 
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
@@ -3818,10 +3845,6 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function childNodes (node) {
-  return node.childNodes
-}
-
 function setAttribute (node, key, val) {
   node.setAttribute(key, val);
 }
@@ -3839,7 +3862,6 @@ var nodeOps = Object.freeze({
 	nextSibling: nextSibling,
 	tagName: tagName,
 	setTextContent: setTextContent,
-	childNodes: childNodes,
 	setAttribute: setAttribute
 });
 
@@ -4067,7 +4089,11 @@ function createPatchFunction (backend) {
 
   function insert (parent, elm, ref) {
     if (parent) {
-      nodeOps.insertBefore(parent, elm, ref);
+      if (ref) {
+        nodeOps.insertBefore(parent, elm, ref);
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
     }
   }
 
@@ -4247,15 +4273,15 @@ function createPatchFunction (backend) {
               'Make sure each v-for item has a unique key.'
             );
           }
-          if (elmToMove.tag !== newStartVnode.tag) {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
+          if (sameVnode(elmToMove, newStartVnode)) {
             patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm);
             newStartVnode = newCh[++newStartIdx];
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            newStartVnode = newCh[++newStartIdx];
           }
         }
       }
@@ -4329,6 +4355,11 @@ function createPatchFunction (backend) {
   }
 
   var bailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue) {
     if (process.env.NODE_ENV !== 'production') {
       if (!assertNodeMatch(elm, vnode)) {
@@ -4349,36 +4380,40 @@ function createPatchFunction (backend) {
     }
     if (isDef(tag)) {
       if (isDef(children)) {
-        var childNodes = nodeOps.childNodes(elm);
         // empty element, allow client to pick up and populate children
-        if (!childNodes.length) {
+        if (!elm.hasChildNodes()) {
           createChildren(vnode, children, insertedVnodeQueue);
         } else {
           var childrenMatch = true;
-          if (childNodes.length !== children.length) {
-            childrenMatch = false;
-          } else {
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!hydrate(childNodes[i$1], children[i$1], insertedVnodeQueue)) {
-                childrenMatch = false;
-                break
-              }
+          var childNode = elm.firstChild;
+          for (var i$1 = 0; i$1 < children.length; i$1++) {
+            if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
+              childrenMatch = false;
+              break
             }
+            childNode = childNode.nextSibling;
           }
-          if (!childrenMatch) {
+          // if childNode is not null, it means the actual childNodes list is
+          // longer than the virtual children list.
+          if (!childrenMatch || childNode) {
             if (process.env.NODE_ENV !== 'production' &&
                 typeof console !== 'undefined' &&
                 !bailed) {
               bailed = true;
               console.warn('Parent: ', elm);
-              console.warn('Mismatching childNodes vs. VNodes: ', childNodes, children);
+              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
             }
             return false
           }
         }
       }
       if (isDef(data)) {
-        invokeCreateHooks(vnode, insertedVnodeQueue);
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
       }
     }
     return true
@@ -4388,7 +4423,7 @@ function createPatchFunction (backend) {
     if (vnode.tag) {
       return (
         vnode.tag.indexOf('vue-component') === 0 ||
-        vnode.tag.toLowerCase() === nodeOps.tagName(node).toLowerCase()
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
       )
     } else {
       return _toString(vnode.text) === node.data
@@ -4485,13 +4520,13 @@ var directives = {
   }
 };
 
-function updateDirectives (
-  oldVnode,
-  vnode
-) {
-  if (!oldVnode.data.directives && !vnode.data.directives) {
-    return
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
   }
+}
+
+function _update (oldVnode, vnode) {
   var isCreate = oldVnode === emptyNode;
   var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
   var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
@@ -4521,9 +4556,9 @@ function updateDirectives (
 
   if (dirsWithInsert.length) {
     var callInsert = function () {
-      dirsWithInsert.forEach(function (dir) {
-        callHook$1(dir, 'inserted', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
     };
     if (isCreate) {
       mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert, 'dir-insert');
@@ -4534,9 +4569,9 @@ function updateDirectives (
 
   if (dirsWithPostpatch.length) {
     mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
-      dirsWithPostpatch.forEach(function (dir) {
-        callHook$1(dir, 'componentUpdated', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
     }, 'dir-postpatch');
   }
 
@@ -4610,6 +4645,11 @@ function updateAttrs (oldVnode, vnode) {
       setAttr(elm, key, cur);
     }
   }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  /* istanbul ignore if */
+  if (isIE9 && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
   for (key in oldAttrs) {
     if (attrs[key] == null) {
       if (isXlink(key)) {
@@ -4683,8 +4723,26 @@ var klass = {
   update: updateClass
 };
 
-// skip type checking this file because we need to attach private properties
-// to elements
+/*  */
+
+var target;
+
+function add$1 (event, handler, once, capture) {
+  if (once) {
+    var oldHandler = handler;
+    handler = function (ev) {
+      remove$2(event, handler, capture);
+      arguments.length === 1
+        ? oldHandler(ev)
+        : oldHandler.apply(null, arguments);
+    };
+  }
+  target.addEventListener(event, handler, capture);
+}
+
+function remove$2 (event, handler, capture) {
+  target.removeEventListener(event, handler, capture);
+}
 
 function updateDOMListeners (oldVnode, vnode) {
   if (!oldVnode.data.on && !vnode.data.on) {
@@ -4692,26 +4750,8 @@ function updateDOMListeners (oldVnode, vnode) {
   }
   var on = vnode.data.on || {};
   var oldOn = oldVnode.data.on || {};
-  var add = vnode.elm._v_add || (
-    vnode.elm._v_add = function (event, handler, once, capture) {
-      if (once) {
-        var oldHandler = handler;
-        handler = function (ev) {
-          remove(event, handler, capture);
-          arguments.length === 1
-            ? oldHandler(ev)
-            : oldHandler.apply(null, arguments);
-        };
-      }
-      vnode.elm.addEventListener(event, handler, capture);
-    }
-  );
-  var remove = vnode.elm._v_remove || (
-    vnode.elm._v_remove = function (event, handler, capture) {
-      vnode.elm.removeEventListener(event, handler, capture);
-    }
-  );
-  updateListeners(on, oldOn, add, remove, vnode.context);
+  target = vnode.elm;
+  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
 }
 
 var events = {
@@ -4754,7 +4794,10 @@ function updateDOMProps (oldVnode, vnode) {
       elm._value = cur;
       // avoid resetting cursor position when value is the same
       var strCur = cur == null ? '' : String(cur);
-      if (elm.value !== strCur && !elm.composing) {
+      if (!elm.composing && (
+        (document.activeElement !== elm && elm.value !== strCur) ||
+        isValueChanged(vnode, strCur)
+      )) {
         elm.value = strCur;
       }
     } else {
@@ -4763,6 +4806,18 @@ function updateDOMProps (oldVnode, vnode) {
   }
 }
 
+function isValueChanged (vnode, newVal) {
+  var value = vnode.elm.value;
+  var modifiers = vnode.elm._vModifiers; // injected by v-model runtime
+  if ((modifiers && modifiers.number) || vnode.elm.type === 'number') {
+    return toNumber(value) !== toNumber(newVal)
+  }
+  if (modifiers && modifiers.trim) {
+    return value.trim() !== newVal.trim()
+  }
+  return value !== newVal
+}
+
 var domProps = {
   create: updateDOMProps,
   update: updateDOMProps
@@ -5107,7 +5162,7 @@ function toMs (s) {
 
 /*  */
 
-function enter (vnode) {
+function enter (vnode, toggleDisplay) {
   var el = vnode.elm;
 
   // call leave callback now
@@ -5216,6 +5271,7 @@ function enter (vnode) {
   }
 
   if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
     enterHook && enterHook(el, cb);
   }
 
@@ -5425,17 +5481,17 @@ var model = {
       if (isIE || isEdge) {
         setTimeout(cb, 0);
       }
-    } else if (
-      (vnode.tag === 'textarea' || el.type === 'text') &&
-      !binding.modifiers.lazy
-    ) {
-      if (!isAndroid) {
-        el.addEventListener('compositionstart', onCompositionStart);
-        el.addEventListener('compositionend', onCompositionEnd);
-      }
-      /* istanbul ignore if */
-      if (isIE9) {
-        el.vmodel = true;
+    } else if (vnode.tag === 'textarea' || el.type === 'text') {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+        }
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
       }
     }
   },
@@ -5534,12 +5590,16 @@ var show = {
 
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
     if (value && transition && !isIE9) {
-      enter(vnode);
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
     }
-    var originalDisplay = el.style.display === 'none' ? '' : el.style.display;
-    el.style.display = value ? originalDisplay : 'none';
-    el.__vOriginalDisplay = originalDisplay;
   },
   update: function update (el, ref, vnode) {
     var value = ref.value;
@@ -5550,9 +5610,11 @@ var show = {
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
     if (transition && !isIE9) {
+      vnode.data.show = true;
       if (value) {
-        enter(vnode);
-        el.style.display = el.__vOriginalDisplay;
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
       } else {
         leave(vnode, function () {
           el.style.display = 'none';
@@ -5924,7 +5986,7 @@ setTimeout(function () {
       devtools.emit('init', Vue$2);
     } else if (
       process.env.NODE_ENV !== 'production' &&
-      inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)
+      inBrowser && !isEdge && /Chrome\/\d+/.test(window.navigator.userAgent)
     ) {
       console.log(
         'Download the Vue Devtools for a better development experience:\n' +
diff --git a/dist/vue.runtime.js b/dist/vue.runtime.js
index 07a1c660cec..d9c9f693201 100644
--- a/dist/vue.runtime.js
+++ b/dist/vue.runtime.js
@@ -1,5 +1,5 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
@@ -200,6 +200,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -280,6 +285,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -489,10 +499,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -710,9 +720,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -1178,11 +1187,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if ("development" !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -1384,6 +1396,7 @@ var util = Object.freeze({
 	toObject: toObject,
 	noop: noop,
 	no: no,
+	identity: identity,
 	genStaticKeys: genStaticKeys,
 	looseEqual: looseEqual,
 	looseIndexOf: looseIndexOf,
@@ -1878,7 +1891,8 @@ function initData (vm) {
   if (!isPlainObject(data)) {
     data = {};
     "development" !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     );
   }
@@ -2054,7 +2068,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -2063,7 +2076,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -2078,13 +2091,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -2096,10 +2113,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -2116,167 +2133,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-function mergeVNodeHook (def, hookKey, hook, key) {
-  key = key + hookKey;
-  var injectedHash = def.__injected || (def.__injected = {});
-  if (!injectedHash[key]) {
-    injectedHash[key] = true;
-    var oldHook = def[hookKey];
-    if (oldHook) {
-      def[hookKey] = function () {
-        oldHook.apply(this, arguments);
-        hook.apply(this, arguments);
-      };
-    } else {
-      def[hookKey] = hook;
-    }
-  }
-}
-
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      "development" !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-function getFirstComponentChild (children) {
-  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
-}
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm) {
@@ -2312,7 +2168,7 @@ function lifecycleMixin (Vue) {
     var vm = this;
     vm.$el = el;
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode;
+      vm.$options.render = createEmptyVNode;
       {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -2563,7 +2419,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -2583,19 +2439,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind$1(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -2806,26 +2660,172 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+function mergeVNodeHook (def, hookKey, hook, key) {
+  key = key + hookKey;
+  var injectedHash = def.__injected || (def.__injected = {});
+  if (!injectedHash[key]) {
+    injectedHash[key] = true;
+    var oldHook = def[hookKey];
+    if (oldHook) {
+      def[hookKey] = function () {
+        oldHook.apply(this, arguments);
+        hook.apply(this, arguments);
+      };
+    } else {
+      def[hookKey] = hook;
+    }
+  }
+}
+
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      "development" !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+function getFirstComponentChild (children) {
+  return children && children.filter(function (c) { return c && c.componentOptions; })[0]
+}
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     "development" !== 'production' && warn(
@@ -2833,11 +2833,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -2846,31 +2846,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -2884,9 +2906,14 @@ function initRender (vm) {
   var renderContext = parentVnode && parentVnode.context;
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext);
   vm.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind$1(createElement, vm);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
   if (vm.$options.el) {
     vm.$mount(vm.$options.el);
   }
@@ -2947,21 +2974,21 @@ function renderMixin (Vue) {
           vm
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -3015,7 +3042,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -3119,14 +3145,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -3380,7 +3405,8 @@ function initExtend (Vue) {
       if (!/^[a-zA-Z][\w-]*$/.test(name)) {
         warn(
           'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characaters and the hyphen.'
+          'can only contain alphanumeric characters and the hyphen, ' +
+          'and must start with a letter.'
         );
       }
     }
@@ -3561,14 +3587,15 @@ Object.defineProperty(Vue$2.prototype, '$isServer', {
   get: isServerRendering
 });
 
-Vue$2.version = '2.1.4';
+Vue$2.version = '2.1.5';
 
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
@@ -3818,10 +3845,6 @@ function setTextContent (node, text) {
   node.textContent = text;
 }
 
-function childNodes (node) {
-  return node.childNodes
-}
-
 function setAttribute (node, key, val) {
   node.setAttribute(key, val);
 }
@@ -3839,7 +3862,6 @@ var nodeOps = Object.freeze({
 	nextSibling: nextSibling,
 	tagName: tagName,
 	setTextContent: setTextContent,
-	childNodes: childNodes,
 	setAttribute: setAttribute
 });
 
@@ -4067,7 +4089,11 @@ function createPatchFunction (backend) {
 
   function insert (parent, elm, ref) {
     if (parent) {
-      nodeOps.insertBefore(parent, elm, ref);
+      if (ref) {
+        nodeOps.insertBefore(parent, elm, ref);
+      } else {
+        nodeOps.appendChild(parent, elm);
+      }
     }
   }
 
@@ -4247,15 +4273,15 @@ function createPatchFunction (backend) {
               'Make sure each v-for item has a unique key.'
             );
           }
-          if (elmToMove.tag !== newStartVnode.tag) {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
-            newStartVnode = newCh[++newStartIdx];
-          } else {
+          if (sameVnode(elmToMove, newStartVnode)) {
             patchVnode(elmToMove, newStartVnode, insertedVnodeQueue);
             oldCh[idxInOld] = undefined;
             canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm);
             newStartVnode = newCh[++newStartIdx];
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm);
+            newStartVnode = newCh[++newStartIdx];
           }
         }
       }
@@ -4329,6 +4355,11 @@ function createPatchFunction (backend) {
   }
 
   var bailed = false;
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  var isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key');
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue) {
     {
       if (!assertNodeMatch(elm, vnode)) {
@@ -4349,36 +4380,40 @@ function createPatchFunction (backend) {
     }
     if (isDef(tag)) {
       if (isDef(children)) {
-        var childNodes = nodeOps.childNodes(elm);
         // empty element, allow client to pick up and populate children
-        if (!childNodes.length) {
+        if (!elm.hasChildNodes()) {
           createChildren(vnode, children, insertedVnodeQueue);
         } else {
           var childrenMatch = true;
-          if (childNodes.length !== children.length) {
-            childrenMatch = false;
-          } else {
-            for (var i$1 = 0; i$1 < children.length; i$1++) {
-              if (!hydrate(childNodes[i$1], children[i$1], insertedVnodeQueue)) {
-                childrenMatch = false;
-                break
-              }
+          var childNode = elm.firstChild;
+          for (var i$1 = 0; i$1 < children.length; i$1++) {
+            if (!childNode || !hydrate(childNode, children[i$1], insertedVnodeQueue)) {
+              childrenMatch = false;
+              break
             }
+            childNode = childNode.nextSibling;
           }
-          if (!childrenMatch) {
+          // if childNode is not null, it means the actual childNodes list is
+          // longer than the virtual children list.
+          if (!childrenMatch || childNode) {
             if ("development" !== 'production' &&
                 typeof console !== 'undefined' &&
                 !bailed) {
               bailed = true;
               console.warn('Parent: ', elm);
-              console.warn('Mismatching childNodes vs. VNodes: ', childNodes, children);
+              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children);
             }
             return false
           }
         }
       }
       if (isDef(data)) {
-        invokeCreateHooks(vnode, insertedVnodeQueue);
+        for (var key in data) {
+          if (!isRenderedModule(key)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue);
+            break
+          }
+        }
       }
     }
     return true
@@ -4388,7 +4423,7 @@ function createPatchFunction (backend) {
     if (vnode.tag) {
       return (
         vnode.tag.indexOf('vue-component') === 0 ||
-        vnode.tag.toLowerCase() === nodeOps.tagName(node).toLowerCase()
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
       )
     } else {
       return _toString(vnode.text) === node.data
@@ -4485,13 +4520,13 @@ var directives = {
   }
 };
 
-function updateDirectives (
-  oldVnode,
-  vnode
-) {
-  if (!oldVnode.data.directives && !vnode.data.directives) {
-    return
+function updateDirectives (oldVnode, vnode) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode);
   }
+}
+
+function _update (oldVnode, vnode) {
   var isCreate = oldVnode === emptyNode;
   var oldDirs = normalizeDirectives$1(oldVnode.data.directives, oldVnode.context);
   var newDirs = normalizeDirectives$1(vnode.data.directives, vnode.context);
@@ -4521,9 +4556,9 @@ function updateDirectives (
 
   if (dirsWithInsert.length) {
     var callInsert = function () {
-      dirsWithInsert.forEach(function (dir) {
-        callHook$1(dir, 'inserted', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithInsert.length; i++) {
+        callHook$1(dirsWithInsert[i], 'inserted', vnode, oldVnode);
+      }
     };
     if (isCreate) {
       mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert, 'dir-insert');
@@ -4534,9 +4569,9 @@ function updateDirectives (
 
   if (dirsWithPostpatch.length) {
     mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', function () {
-      dirsWithPostpatch.forEach(function (dir) {
-        callHook$1(dir, 'componentUpdated', vnode, oldVnode);
-      });
+      for (var i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook$1(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode);
+      }
     }, 'dir-postpatch');
   }
 
@@ -4610,6 +4645,11 @@ function updateAttrs (oldVnode, vnode) {
       setAttr(elm, key, cur);
     }
   }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  /* istanbul ignore if */
+  if (isIE9 && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value);
+  }
   for (key in oldAttrs) {
     if (attrs[key] == null) {
       if (isXlink(key)) {
@@ -4683,8 +4723,26 @@ var klass = {
   update: updateClass
 };
 
-// skip type checking this file because we need to attach private properties
-// to elements
+/*  */
+
+var target;
+
+function add$1 (event, handler, once, capture) {
+  if (once) {
+    var oldHandler = handler;
+    handler = function (ev) {
+      remove$2(event, handler, capture);
+      arguments.length === 1
+        ? oldHandler(ev)
+        : oldHandler.apply(null, arguments);
+    };
+  }
+  target.addEventListener(event, handler, capture);
+}
+
+function remove$2 (event, handler, capture) {
+  target.removeEventListener(event, handler, capture);
+}
 
 function updateDOMListeners (oldVnode, vnode) {
   if (!oldVnode.data.on && !vnode.data.on) {
@@ -4692,26 +4750,8 @@ function updateDOMListeners (oldVnode, vnode) {
   }
   var on = vnode.data.on || {};
   var oldOn = oldVnode.data.on || {};
-  var add = vnode.elm._v_add || (
-    vnode.elm._v_add = function (event, handler, once, capture) {
-      if (once) {
-        var oldHandler = handler;
-        handler = function (ev) {
-          remove(event, handler, capture);
-          arguments.length === 1
-            ? oldHandler(ev)
-            : oldHandler.apply(null, arguments);
-        };
-      }
-      vnode.elm.addEventListener(event, handler, capture);
-    }
-  );
-  var remove = vnode.elm._v_remove || (
-    vnode.elm._v_remove = function (event, handler, capture) {
-      vnode.elm.removeEventListener(event, handler, capture);
-    }
-  );
-  updateListeners(on, oldOn, add, remove, vnode.context);
+  target = vnode.elm;
+  updateListeners(on, oldOn, add$1, remove$2, vnode.context);
 }
 
 var events = {
@@ -4754,7 +4794,10 @@ function updateDOMProps (oldVnode, vnode) {
       elm._value = cur;
       // avoid resetting cursor position when value is the same
       var strCur = cur == null ? '' : String(cur);
-      if (elm.value !== strCur && !elm.composing) {
+      if (!elm.composing && (
+        (document.activeElement !== elm && elm.value !== strCur) ||
+        isValueChanged(vnode, strCur)
+      )) {
         elm.value = strCur;
       }
     } else {
@@ -4763,6 +4806,18 @@ function updateDOMProps (oldVnode, vnode) {
   }
 }
 
+function isValueChanged (vnode, newVal) {
+  var value = vnode.elm.value;
+  var modifiers = vnode.elm._vModifiers; // injected by v-model runtime
+  if ((modifiers && modifiers.number) || vnode.elm.type === 'number') {
+    return toNumber(value) !== toNumber(newVal)
+  }
+  if (modifiers && modifiers.trim) {
+    return value.trim() !== newVal.trim()
+  }
+  return value !== newVal
+}
+
 var domProps = {
   create: updateDOMProps,
   update: updateDOMProps
@@ -5107,7 +5162,7 @@ function toMs (s) {
 
 /*  */
 
-function enter (vnode) {
+function enter (vnode, toggleDisplay) {
   var el = vnode.elm;
 
   // call leave callback now
@@ -5216,6 +5271,7 @@ function enter (vnode) {
   }
 
   if (vnode.data.show) {
+    toggleDisplay && toggleDisplay();
     enterHook && enterHook(el, cb);
   }
 
@@ -5425,17 +5481,17 @@ var model = {
       if (isIE || isEdge) {
         setTimeout(cb, 0);
       }
-    } else if (
-      (vnode.tag === 'textarea' || el.type === 'text') &&
-      !binding.modifiers.lazy
-    ) {
-      if (!isAndroid) {
-        el.addEventListener('compositionstart', onCompositionStart);
-        el.addEventListener('compositionend', onCompositionEnd);
-      }
-      /* istanbul ignore if */
-      if (isIE9) {
-        el.vmodel = true;
+    } else if (vnode.tag === 'textarea' || el.type === 'text') {
+      el._vModifiers = binding.modifiers;
+      if (!binding.modifiers.lazy) {
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart);
+          el.addEventListener('compositionend', onCompositionEnd);
+        }
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true;
+        }
       }
     }
   },
@@ -5534,12 +5590,16 @@ var show = {
 
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
+    var originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display;
     if (value && transition && !isIE9) {
-      enter(vnode);
+      vnode.data.show = true;
+      enter(vnode, function () {
+        el.style.display = originalDisplay;
+      });
+    } else {
+      el.style.display = value ? originalDisplay : 'none';
     }
-    var originalDisplay = el.style.display === 'none' ? '' : el.style.display;
-    el.style.display = value ? originalDisplay : 'none';
-    el.__vOriginalDisplay = originalDisplay;
   },
   update: function update (el, ref, vnode) {
     var value = ref.value;
@@ -5550,9 +5610,11 @@ var show = {
     vnode = locateNode(vnode);
     var transition = vnode.data && vnode.data.transition;
     if (transition && !isIE9) {
+      vnode.data.show = true;
       if (value) {
-        enter(vnode);
-        el.style.display = el.__vOriginalDisplay;
+        enter(vnode, function () {
+          el.style.display = el.__vOriginalDisplay;
+        });
       } else {
         leave(vnode, function () {
           el.style.display = 'none';
@@ -5924,7 +5986,7 @@ setTimeout(function () {
       devtools.emit('init', Vue$2);
     } else if (
       "development" !== 'production' &&
-      inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)
+      inBrowser && !isEdge && /Chrome\/\d+/.test(window.navigator.userAgent)
     ) {
       console.log(
         'Download the Vue Devtools for a better development experience:\n' +
diff --git a/dist/vue.runtime.min.js b/dist/vue.runtime.min.js
index 5f6855dd94a..5b59916dfe4 100644
--- a/dist/vue.runtime.min.js
+++ b/dist/vue.runtime.min.js
@@ -1,7 +1,7 @@
 /*!
- * Vue.js v2.1.4
+ * Vue.js v2.1.5
  * (c) 2014-2016 Evan You
  * Released under the MIT License.
  */
-!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):t.Vue=e()}(this,function(){"use strict";function t(t){return null==t?"":"object"==typeof t?JSON.stringify(t,null,2):String(t)}function e(t){var e=parseFloat(t,10);return e||0===e?e:t}function n(t,e){for(var n=Object.create(null),r=t.split(","),i=0;i<r.length;i++)n[r[i]]=!0;return e?function(t){return n[t.toLowerCase()]}:function(t){return n[t]}}function r(t,e){if(t.length){var n=t.indexOf(e);if(n>-1)return t.splice(n,1)}}function i(t,e){return cn.call(t,e)}function o(t){return"string"==typeof t||"number"==typeof t}function a(t){var e=Object.create(null);return function(n){var r=e[n];return r||(e[n]=t(n))}}function s(t,e){function n(n){var r=arguments.length;return r?r>1?t.apply(e,arguments):t.call(e,n):t.call(e)}return n._length=t.length,n}function c(t,e){e=e||0;for(var n=t.length-e,r=new Array(n);n--;)r[n]=t[n+e];return r}function l(t,e){for(var n in 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t;Cn.errorHandler.call(null,t,this.vm)}else this.cb.call(this.vm,t,e)}}},tr.prototype.evaluate=function(){this.value=this.get(),this.dirty=!1},tr.prototype.depend=function(){for(var t=this,e=this.deps.length;e--;)t.deps[e].depend()},tr.prototype.teardown=function(){var t=this;if(this.active){this.vm._isBeingDestroyed||this.vm._vForRemoving||r(this.vm._watchers,this);for(var e=this.deps.length;e--;)t.deps[e].removeSub(t);this.active=!1}};var er=new un,nr={enumerable:!0,configurable:!0,get:p,set:p},rr=function(t,e,n,r,i,o,a){this.tag=t,this.data=e,this.children=n,this.text=r,this.elm=i,this.ns=void 0,this.context=o,this.functionalContext=void 0,this.key=e&&e.key,this.componentOptions=a,this.child=void 0,this.parent=void 0,this.raw=!1,this.isStatic=!1,this.isRootInsert=!0,this.isComment=!1,this.isCloned=!1,this.isOnce=!1},ir=function(){var t=new rr;return t.text="",t.isComment=!0,t},or=null,ar={init:ft,prepatch:dt,insert:pt,destroy:vt},sr=Object.keys(ar),cr=0;Nt(Ut),tt(Ut),Pt(Ut),at(Ut),Tt(Ut);var lr=[String,RegExp],ur={name:"keep-alive",abstract:!0,props:{include:lr,exclude:lr},created:function(){this.cache=Object.create(null)},render:function(){var t=kt(this.$slots.default);if(t&&t.componentOptions){var e=t.componentOptions,n=e.Ctor.options.name||e.tag;if(n&&(this.include&&!Ht(this.include,n)||this.exclude&&Ht(this.exclude,n)))return t;var r=null==t.key?e.Ctor.cid+(e.tag?"::"+e.tag:""):t.key;this.cache[r]?t.child=this.cache[r].child:this.cache[r]=t,t.data.keepAlive=!0}return t},destroyed:function(){var t=this;for(var e in this.cache){var n=t.cache[e];st(n.child,"deactivated"),n.child.$destroy()}}},fr={KeepAlive:ur};zt(Ut),Object.defineProperty(Ut.prototype,"$isServer",{get:Dn}),Ut.version="2.1.5";var dr,pr,vr=n("input,textarea,option,select"),hr=function(t,e){return"value"===e&&vr(t)||"selected"===e&&"option"===t||"checked"===e&&"input"===t||"muted"===e&&"video"===t},mr=n("contenteditable,draggable,spellcheck"),yr=n("allowfullscreen,async,autofocus,autoplay,checked,compact,controls,declare,default,defaultchecked,defaultmuted,defaultselected,defer,disabled,enabled,formnovalidate,hidden,indeterminate,inert,ismap,itemscope,loop,multiple,muted,nohref,noresize,noshade,novalidate,nowrap,open,pauseonexit,readonly,required,reversed,scoped,seamless,selected,sortable,translate,truespeed,typemustmatch,visible"),_r="http://www.w3.org/1999/xlink",gr=function(t){return":"===t.charAt(5)&&"xlink"===t.slice(0,5)},br=function(t){return gr(t)?t.slice(6,t.length):""},wr=function(t){return null==t||t===!1},Cr={svg:"http://www.w3.org/2000/svg",math:"http://www.w3.org/1998/Math/MathML",xhtml:"http://www.w3.org/1999/xhtml"},$r=n("html,body,base,head,link,meta,style,title,address,article,aside,footer,header,h1,h2,h3,h4,h5,h6,hgroup,nav,section,div,dd,dl,dt,figcaption,figure,hr,img,li,main,ol,p,pre,ul,a,b,abbr,bdi,bdo,br,cite,code,data,dfn,em,i,kbd,mark,q,rp,rt,rtc,ruby,s,samp,small,span,strong,sub,sup,time,u,var,wbr,area,audio,map,track,video,embed,object,param,source,canvas,script,noscript,del,ins,caption,col,colgroup,table,thead,tbody,td,th,tr,button,datalist,fieldset,form,input,label,legend,meter,optgroup,option,output,progress,select,textarea,details,dialog,menu,menuitem,summary,content,element,shadow,template"),xr=n("svg,animate,circle,clippath,cursor,defs,desc,ellipse,filter,font,font-face,g,glyph,image,line,marker,mask,missing-glyph,path,pattern,polygon,polyline,rect,switch,symbol,text,textpath,tspan,use,view",!0),Ar=function(t){return $r(t)||xr(t)},kr=Object.create(null),Or=Object.freeze({createElement:Yt,createElementNS:te,createTextNode:ee,createComment:ne,insertBefore:re,removeChild:ie,appendChild:oe,parentNode:ae,nextSibling:se,tagName:ce,setTextContent:le,setAttribute:ue}),Sr={create:function(t,e){fe(e)},update:function(t,e){t.data.ref!==e.data.ref&&(fe(t,!0),fe(e))},destroy:function(t){fe(t,!0)}},Er=new rr("",{},[]),jr=["create","activate","update","remove","destroy"],Tr={create:ye,update:ye,destroy:function(t){ye(t,Er)}},Dr=Object.create(null),Lr=[Sr,Tr],Pr={create:Ce,update:Ce},Nr={create:xe,update:xe},Mr={create:Oe,update:Oe},Ir={create:Se,update:Se},Ur=a(function(t){var e={},n=/;(?![^(]*\))/g,r=/:(.+)/;return t.split(n).forEach(function(t){if(t){var n=t.split(r);n.length>1&&(e[n[0].trim()]=n[1].trim())}}),e}),Rr=/^--/,Br=/\s*!important$/,Vr=function(t,e,n){Rr.test(e)?t.style.setProperty(e,n):Br.test(n)?t.style.setProperty(e,n.replace(Br,""),"important"):t.style[Hr(e)]=n},Fr=["Webkit","Moz","ms"],Hr=a(function(t){if(pr=pr||document.createElement("div"),t=vn(t),"filter"!==t&&t in pr.style)return t;for(var e=t.charAt(0).toUpperCase()+t.slice(1),n=0;n<Fr.length;n++){var r=Fr[n]+e;if(r in pr.style)return r}}),zr={create:Le,update:Le},qr=An&&!Sn,Kr="transition",Wr="animation",Jr="transition",Gr="transitionend",Zr="animation",Qr="animationend";qr&&(void 0===window.ontransitionend&&void 0!==window.onwebkittransitionend&&(Jr="WebkitTransition",Gr="webkitTransitionEnd"),void 0===window.onanimationend&&void 0!==window.onwebkitanimationend&&(Zr="WebkitAnimation",Qr="webkitAnimationEnd"));var Xr=An&&window.requestAnimationFrame||setTimeout,Yr=/\b(transform|all)(,|$)/,ti=a(function(t){return{enterClass:t+"-enter",leaveClass:t+"-leave",appearClass:t+"-enter",enterActiveClass:t+"-enter-active",leaveActiveClass:t+"-leave-active",appearActiveClass:t+"-enter-active"}}),ei=An?{create:We,activate:We,remove:function(t,e){t.data.show?e():ze(t,e)}}:{},ni=[Pr,Nr,Mr,Ir,zr,ei],ri=ni.concat(Lr),ii=me({nodeOps:Or,modules:ri});Sn&&document.addEventListener("selectionchange",function(){var t=document.activeElement;t&&t.vmodel&&Ye(t,"input")});var oi={inserted:function(t,e,n){if("select"===n.tag){var r=function(){Je(t,e,n.context)};r(),(On||En)&&setTimeout(r,0)}else"textarea"!==n.tag&&"text"!==t.type||(t._vModifiers=e.modifiers,e.modifiers.lazy||(jn||(t.addEventListener("compositionstart",Qe),t.addEventListener("compositionend",Xe)),Sn&&(t.vmodel=!0)))},componentUpdated:function(t,e,n){if("select"===n.tag){Je(t,e,n.context);var r=t.multiple?e.value.some(function(e){return Ge(e,t.options)}):e.value!==e.oldValue&&Ge(e.value,t.options);r&&Ye(t,"change")}}},ai={bind:function(t,e,n){var r=e.value;n=tn(n);var i=n.data&&n.data.transition,o=t.__vOriginalDisplay="none"===t.style.display?"":t.style.display;r&&i&&!Sn?(n.data.show=!0,He(n,function(){t.style.display=o})):t.style.display=r?o:"none"},update:function(t,e,n){var r=e.value,i=e.oldValue;if(r!==i){n=tn(n);var o=n.data&&n.data.transition;o&&!Sn?(n.data.show=!0,r?He(n,function(){t.style.display=t.__vOriginalDisplay}):ze(n,function(){t.style.display="none"})):t.style.display=r?t.__vOriginalDisplay:"none"}}},si={model:oi,show:ai},ci={name:String,appear:Boolean,css:Boolean,mode:String,type:String,enterClass:String,leaveClass:String,enterActiveClass:String,leaveActiveClass:String,appearClass:String,appearActiveClass:String},li={name:"transition",props:ci,abstract:!0,render:function(t){var e=this,n=this.$slots.default;if(n&&(n=n.filter(function(t){return t.tag}),n.length)){var r=this.mode,i=n[0];if(on(this.$vnode))return i;var o=en(i);if(!o)return i;if(this._leaving)return rn(t,i);var a=o.key=null==o.key||o.isStatic?"__v"+(o.tag+this._uid)+"__":o.key,s=(o.data||(o.data={})).transition=nn(this),c=this._vnode,u=en(c);if(o.data.directives&&o.data.directives.some(function(t){return"show"===t.name})&&(o.data.show=!0),u&&u.data&&u.key!==a){var f=u.data.transition=l({},s);if("out-in"===r)return this._leaving=!0,bt(f,"afterLeave",function(){e._leaving=!1,e.$forceUpdate()},a),rn(t,i);if("in-out"===r){var d,p=function(){d()};bt(s,"afterEnter",p,a),bt(s,"enterCancelled",p,a),bt(f,"delayLeave",function(t){d=t},a)}}return i}}},ui=l({tag:String,moveClass:String},ci);delete ui.mode;var fi={props:ui,render:function(t){for(var e=this.tag||this.$vnode.data.tag||"span",n=Object.create(null),r=this.prevChildren=this.children,i=this.$slots.default||[],o=this.children=[],a=nn(this),s=0;s<i.length;s++){var c=i[s];c.tag&&null!=c.key&&0!==String(c.key).indexOf("__vlist")&&(o.push(c),n[c.key]=c,(c.data||(c.data={})).transition=a)}if(r){for(var l=[],u=[],f=0;f<r.length;f++){var d=r[f];d.data.transition=a,d.data.pos=d.elm.getBoundingClientRect(),n[d.key]?l.push(d):u.push(d)}this.kept=t(e,null,l),this.removed=u}return t(e,null,o)},beforeUpdate:function(){this.__patch__(this._vnode,this.kept,!1,!0),this._vnode=this.kept},updated:function(){var t=this.prevChildren,e=this.moveClass||(this.name||"v")+"-move";if(t.length&&this.hasMove(t[0].elm,e)){t.forEach(an),t.forEach(sn),t.forEach(cn);document.body.offsetHeight;t.forEach(function(t){if(t.data.moved){var n=t.elm,r=n.style;Ie(n,e),r.transform=r.WebkitTransform=r.transitionDuration="",n.addEventListener(Gr,n._moveCb=function t(r){r&&!/transform$/.test(r.propertyName)||(n.removeEventListener(Gr,t),n._moveCb=null,Ue(n,e))})}})}},methods:{hasMove:function(t,e){if(!qr)return!1;if(null!=this._hasMove)return this._hasMove;Ie(t,e);var n=Be(t);return Ue(t,e),this._hasMove=n.hasTransform}}},di={Transition:li,TransitionGroup:fi};return Ut.config.isUnknownElement=Qt,Ut.config.isReservedTag=Ar,Ut.config.getTagNamespace=Zt,Ut.config.mustUseProp=hr,l(Ut.options.directives,si),l(Ut.options.components,di),Ut.prototype.__patch__=An?ii:p,Ut.prototype.$mount=function(t,e){return t=t&&An?Xt(t):void 0,this._mount(t,e)},setTimeout(function(){Cn.devtools&&Ln&&Ln.emit("init",Ut)},0),Ut});
\ No newline at end of file
diff --git a/flow/component.js b/flow/component.js
index d211eaec215..75b61efbc41 100644
--- a/flow/component.js
+++ b/flow/component.js
@@ -33,13 +33,13 @@ declare interface Component {
   $mount: (el?: Element | string, hydrating?: boolean) => Component;
   $forceUpdate: () => void;
   $destroy: () => void;
-  $set: (obj: Array<any> | Object, key: any, val: any) => void;
+  $set: (obj: Array<mixed> | Object, key: mixed, val: mixed) => void;
   $delete: (obj: Object, key: string) => void;
   $watch: (expOrFn: string | Function, cb: Function, options?: Object) => Function;
   $on: (event: string, fn: Function) => Component;
   $once: (event: string, fn: Function) => Component;
   $off: (event?: string, fn?: Function) => Component;
-  $emit: (event: string, ...args: Array<any>) => Component;
+  $emit: (event: string, ...args: Array<mixed>) => Component;
   $nextTick: (fn: Function) => void;
   $createElement: (
     tag?: string | Component,
@@ -75,19 +75,21 @@ declare interface Component {
     propsData: ?Object,
     listeners: ?{ [key: string]: Function | Array<Function> },
     parentVnode: VNode,
-    renderChildren: ?VNodeChildren
+    renderChildren: ?Array<VNode>
   ) => void;
   // rendering
   _render: () => VNode;
   __patch__: (a: Element | VNode | void, b: VNode) => any;
   // createElement
-  _h: (vnode?: VNode, data?: VNodeData, children?: VNodeChildren) => VNode | void;
+  _c: (vnode?: VNode, data?: VNodeData, children?: VNodeChildren) => VNode | void;
   // renderStatic
   _m: (index: number, isInFor?: boolean) => VNode | VNodeChildren;
   // markOnce
   _o: (vnode: VNode | Array<VNode>, index: number, key: string) => VNode | VNodeChildren;
   // toString
-  _s: (value: any) => string;
+  _s: (value: mixed) => string;
+  // text to VNode
+  _v: (value: string | number) => VNode;
   // toNumber
   _n: (value: string) => number | string;
   // empty vnode
@@ -99,7 +101,7 @@ declare interface Component {
   // resolveFilter
   _f: (id: string) => Function;
   // renderList
-  _l: (val: any, render: Function) => ?Array<VNode>;
+  _l: (val: mixed, render: Function) => ?Array<VNode>;
   // renderSlot
   _t: (name: string, fallback: ?Array<VNode>, props: ?Object) => ?Array<VNode>;
   // apply v-bind object
diff --git a/flow/options.js b/flow/options.js
index 728b2b817ad..ea7736836da 100644
--- a/flow/options.js
+++ b/flow/options.js
@@ -4,7 +4,7 @@ declare type InternalComponentOptions = {
   propsData: ?Object;
   _parentVnode: VNode;
   _parentListeners: ?Object;
-  _renderChildren: ?VNodeChildren;
+  _renderChildren: ?Array<VNode>;
   _componentTag: ?string;
   _parentElm: ?Node;
   _refElm: ?Node;
@@ -59,7 +59,7 @@ declare type ComponentOptions = {
   _propKeys?: Array<string>;
   _parentVnode?: VNode;
   _parentListeners?: ?Object;
-  _renderChildren?: ?VNodeChildren;
+  _renderChildren?: ?Array<VNode>;
   _componentTag: ?string;
   _scopeId: ?string;
   _base: Class<Component>;
diff --git a/flow/vnode.js b/flow/vnode.js
index d5c66235047..805bdae79b2 100644
--- a/flow/vnode.js
+++ b/flow/vnode.js
@@ -4,7 +4,7 @@ declare type VNodeComponentOptions = {
   Ctor: Class<Component>;
   propsData: ?Object;
   listeners: ?Object;
-  children: ?VNodeChildren;
+  children: ?Array<VNode>;
   tag?: string;
 }
 
@@ -19,7 +19,7 @@ declare type MountedComponentVNode = {
 declare type VNodeWithData = {
   tag: string;
   data: VNodeData;
-  children: Array<VNode> | void;
+  children: ?Array<VNode>;
   text: void;
   elm: any;
   ns: string | void;
diff --git a/package.json b/package.json
index 60d72dd4f58..8a5f542f37a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "Reactive, component-oriented view layer for modern web interfaces.",
   "main": "dist/vue.runtime.common.js",
   "typings": "types/index.d.ts",
@@ -63,7 +63,7 @@
     "babel-eslint": "^7.1.0",
     "babel-helper-vue-jsx-merge-props": "^2.0.2",
     "babel-loader": "^6.2.4",
-    "babel-plugin-coverage": "^1.0.0",
+    "babel-plugin-istanbul": "^3.0.0",
     "babel-plugin-syntax-jsx": "^6.18.0",
     "babel-plugin-transform-vue-jsx": "^3.2.0",
     "babel-preset-es2015": "^6.9.0",
diff --git a/packages/vue-server-renderer/build.js b/packages/vue-server-renderer/build.js
index bcbd86a0028..ddf1fcae61a 100644
--- a/packages/vue-server-renderer/build.js
+++ b/packages/vue-server-renderer/build.js
@@ -323,6 +323,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -403,6 +408,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -855,7 +865,6 @@ function parseFilters (exp) {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
-        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [
@@ -863,6 +872,18 @@ function parseFilters (exp) {
         case 0x7B: curly++; break                 // {
         case 0x7D: curly--; break                 // }
       }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !/[\w$]/.test(p)) {
+          inRegex = true;
+        }
+      }
     }
   }
 
@@ -1068,10 +1089,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -1669,6 +1690,7 @@ function processAttrs (el) {
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
+        isProp = false;
         if (modifiers) {
           if (modifiers.prop) {
             isProp = true;
@@ -2038,7 +2060,7 @@ function generate (
   transforms$1 = pluckModuleFunction(options.modules, 'transformCode');
   dataGenFns = pluckModuleFunction(options.modules, 'genData');
   platformDirectives = options.directives || {};
-  var code = ast ? genElement(ast) : '_h("div")';
+  var code = ast ? genElement(ast) : '_c("div")';
   staticRenderFns = prevStaticRenderFns;
   onceCount = prevOnceCount;
   return {
@@ -2068,8 +2090,8 @@ function genElement (el) {
     } else {
       var data = el.plain ? undefined : genData(el);
 
-      var children = el.inlineTemplate ? null : genChildren(el);
-      code = "_h('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      var children = el.inlineTemplate ? null : genChildren(el, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
     }
     // module transforms
     for (var i = 0; i < transforms$1.length; i++) {
@@ -2266,10 +2288,32 @@ function genScopedSlot (key, el) {
       : genElement(el)) + "}"
 }
 
-function genChildren (el) {
-  if (el.children.length) {
-    return '[' + el.children.map(genNode).join(',') + ']'
+function genChildren (el, checkSkip) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot') {
+      return genElement(el$1)
+    }
+    return ("[" + (children.map(genNode).join(',')) + "]" + (checkSkip
+        ? canSkipNormalization(children) ? '' : ',true'
+        : ''))
+  }
+}
+
+function canSkipNormalization (children) {
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.for || el.tag === 'template' || el.tag === 'slot' ||
+      (el.if && el.ifConditions.some(function (c) { return c.tag === 'template'; }))) {
+      return false
+    }
   }
+  return true
 }
 
 function genNode (node) {
@@ -2281,9 +2325,9 @@ function genNode (node) {
 }
 
 function genText (text) {
-  return text.type === 2
+  return ("_v(" + (text.type === 2
     ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
 }
 
 function genSlot (el) {
@@ -2294,8 +2338,8 @@ function genSlot (el) {
 
 // componentName is el.component, take it as argument to shun flow's pessimistic refinement
 function genComponent (componentName, el) {
-  var children = el.inlineTemplate ? null : genChildren(el);
-  return ("_h(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
+  var children = el.inlineTemplate ? null : genChildren(el, true);
+  return ("_c(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
 }
 
 function genProps (props) {
@@ -2695,10 +2739,12 @@ function genDefaultModel (
   valueExpression = number || type === 'number'
     ? ("_n(" + valueExpression + ")")
     : valueExpression;
+
   var code = genAssignmentCode(value, valueExpression);
   if (isNative && needCompositionGuard) {
     code = "if($event.target.composing)return;" + code;
   }
+
   // inputs with type="file" are read only and setting the input's
   // value will throw an error.
   if (process.env.NODE_ENV !== 'production' &&
@@ -2708,8 +2754,12 @@ function genDefaultModel (
       "File inputs are read only. Use a v-on:change listener instead."
     );
   }
+
   addProp(el, 'value', isNative ? ("_s(" + value + ")") : ("(" + value + ")"));
   addHandler(el, event, code, null, true);
+  if (trim || number || type === 'number') {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
 }
 
 function genSelect (
@@ -3405,9 +3455,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -3625,7 +3674,8 @@ function initData (vm$$1) {
   if (!isPlainObject(data)) {
     data = {};
     process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm$$1
     );
   }
@@ -3801,7 +3851,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -3810,7 +3859,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -3825,13 +3874,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -3843,10 +3896,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -3863,146 +3916,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm$$1
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm$$1
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm$$1) {
@@ -4038,7 +3951,7 @@ function lifecycleMixin (Vue) {
     var vm$$1 = this;
     vm$$1.$el = el;
     if (!vm$$1.$options.render) {
-      vm$$1.$options.render = emptyVNode;
+      vm$$1.$options.render = createEmptyVNode;
       if (process.env.NODE_ENV !== 'production') {
         /* istanbul ignore if */
         if (vm$$1.$options.template && vm$$1.$options.template.charAt(0) !== '#') {
@@ -4289,7 +4202,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -4309,19 +4222,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -4532,26 +4443,151 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm$$1
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm$$1
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     process.env.NODE_ENV !== 'production' && warn(
@@ -4559,11 +4595,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -4572,31 +4608,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -4610,9 +4668,14 @@ function initRender (vm$$1) {
   var renderContext = parentVnode && parentVnode.context;
   vm$$1.$slots = resolveSlots(vm$$1.$options._renderChildren, renderContext);
   vm$$1.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm$$1.$createElement = bind(createElement, vm$$1);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm$$1._c = function (a, b, c, d) { return createElement(vm$$1, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm$$1.$createElement = function (a, b, c, d) { return createElement(vm$$1, a, b, c, d, true); };
   if (vm$$1.$options.el) {
     vm$$1.$mount(vm$$1.$options.el);
   }
@@ -4673,21 +4736,21 @@ function renderMixin (Vue) {
           vm$$1
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -4741,7 +4804,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -4845,14 +4907,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -5360,11 +5421,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -5546,9 +5610,10 @@ function isBooleanType (fn) {
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
@@ -6069,7 +6134,7 @@ function checkBuild (component) {
   while (Vue.super) {
     Vue = Vue.super;
   }
-  if (Vue.compile) {
+  if (Vue.compile && Vue.config.devtools !== false) {
     console.error(
       red("\n[vue-server-renderer] You are using the standalone build (vue/dist/vue.js) for " +
       "server-side rendering. It is recommended to use the CommonJS build " +
diff --git a/packages/vue-server-renderer/package.json b/packages/vue-server-renderer/package.json
index 0ec4cc01e2e..639d3e02a1e 100644
--- a/packages/vue-server-renderer/package.json
+++ b/packages/vue-server-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-server-renderer",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "server renderer for Vue 2.0",
   "main": "index.js",
   "repository": {
diff --git a/packages/vue-template-compiler/build.js b/packages/vue-template-compiler/build.js
index 6303d946fdc..e33d0929ae2 100644
--- a/packages/vue-template-compiler/build.js
+++ b/packages/vue-template-compiler/build.js
@@ -198,6 +198,11 @@ function noop () {}
  */
 var no = function () { return false; };
 
+/**
+ * Return same value
+ */
+var identity = function (_) { return _; };
+
 /**
  * Generate a static keys string from compiler modules.
  */
@@ -278,6 +283,11 @@ var config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
@@ -730,7 +740,6 @@ function parseFilters (exp) {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
-        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [
@@ -738,6 +747,18 @@ function parseFilters (exp) {
         case 0x7B: curly++; break                 // {
         case 0x7D: curly--; break                 // }
       }
+      if (c === 0x2f) { // /
+        var j = i - 1;
+        var p = (void 0);
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j);
+          if (p !== ' ') { break }
+        }
+        if (!p || !/[\w$]/.test(p)) {
+          inRegex = true;
+        }
+      }
     }
   }
 
@@ -943,10 +964,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null);
     }
     Set.prototype.has = function has (key) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     };
     Set.prototype.add = function add (key) {
-      this.set[key] = 1;
+      this.set[key] = true;
     };
     Set.prototype.clear = function clear () {
       this.set = Object.create(null);
@@ -1544,6 +1565,7 @@ function processAttrs (el) {
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '');
         value = parseFilters(value);
+        isProp = false;
         if (modifiers) {
           if (modifiers.prop) {
             isProp = true;
@@ -1913,7 +1935,7 @@ function generate (
   transforms$1 = pluckModuleFunction(options.modules, 'transformCode');
   dataGenFns = pluckModuleFunction(options.modules, 'genData');
   platformDirectives = options.directives || {};
-  var code = ast ? genElement(ast) : '_h("div")';
+  var code = ast ? genElement(ast) : '_c("div")';
   staticRenderFns = prevStaticRenderFns;
   onceCount = prevOnceCount;
   return {
@@ -1943,8 +1965,8 @@ function genElement (el) {
     } else {
       var data = el.plain ? undefined : genData(el);
 
-      var children = el.inlineTemplate ? null : genChildren(el);
-      code = "_h('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
+      var children = el.inlineTemplate ? null : genChildren(el, true);
+      code = "_c('" + (el.tag) + "'" + (data ? ("," + data) : '') + (children ? ("," + children) : '') + ")";
     }
     // module transforms
     for (var i = 0; i < transforms$1.length; i++) {
@@ -2141,10 +2163,32 @@ function genScopedSlot (key, el) {
       : genElement(el)) + "}"
 }
 
-function genChildren (el) {
-  if (el.children.length) {
-    return '[' + el.children.map(genNode).join(',') + ']'
+function genChildren (el, checkSkip) {
+  var children = el.children;
+  if (children.length) {
+    var el$1 = children[0];
+    // optimize single v-for
+    if (children.length === 1 &&
+        el$1.for &&
+        el$1.tag !== 'template' &&
+        el$1.tag !== 'slot') {
+      return genElement(el$1)
+    }
+    return ("[" + (children.map(genNode).join(',')) + "]" + (checkSkip
+        ? canSkipNormalization(children) ? '' : ',true'
+        : ''))
+  }
+}
+
+function canSkipNormalization (children) {
+  for (var i = 0; i < children.length; i++) {
+    var el = children[i];
+    if (el.for || el.tag === 'template' || el.tag === 'slot' ||
+      (el.if && el.ifConditions.some(function (c) { return c.tag === 'template'; }))) {
+      return false
+    }
   }
+  return true
 }
 
 function genNode (node) {
@@ -2156,9 +2200,9 @@ function genNode (node) {
 }
 
 function genText (text) {
-  return text.type === 2
+  return ("_v(" + (text.type === 2
     ? text.expression // no need for () because already wrapped in _s()
-    : transformSpecialNewlines(JSON.stringify(text.text))
+    : transformSpecialNewlines(JSON.stringify(text.text))) + ")")
 }
 
 function genSlot (el) {
@@ -2169,8 +2213,8 @@ function genSlot (el) {
 
 // componentName is el.component, take it as argument to shun flow's pessimistic refinement
 function genComponent (componentName, el) {
-  var children = el.inlineTemplate ? null : genChildren(el);
-  return ("_h(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
+  var children = el.inlineTemplate ? null : genChildren(el, true);
+  return ("_c(" + componentName + "," + (genData(el)) + (children ? ("," + children) : '') + ")")
 }
 
 function genProps (props) {
@@ -2544,10 +2588,12 @@ function genDefaultModel (
   valueExpression = number || type === 'number'
     ? ("_n(" + valueExpression + ")")
     : valueExpression;
+
   var code = genAssignmentCode(value, valueExpression);
   if (isNative && needCompositionGuard) {
     code = "if($event.target.composing)return;" + code;
   }
+
   // inputs with type="file" are read only and setting the input's
   // value will throw an error.
   if (process.env.NODE_ENV !== 'production' &&
@@ -2557,8 +2603,12 @@ function genDefaultModel (
       "File inputs are read only. Use a v-on:change listener instead."
     );
   }
+
   addProp(el, 'value', isNative ? ("_s(" + value + ")") : ("(" + value + ")"));
   addHandler(el, event, code, null, true);
+  if (trim || number || type === 'number') {
+    addHandler(el, 'blur', '$forceUpdate()');
+  }
 }
 
 function genSelect (
@@ -3254,9 +3304,8 @@ function protoAugment (target, src) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target, src, keys) {
   for (var i = 0, l = keys.length; i < l; i++) {
     var key = keys[i];
@@ -3474,7 +3523,8 @@ function initData (vm) {
   if (!isPlainObject(data)) {
     data = {};
     process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     );
   }
@@ -3650,7 +3700,6 @@ var VNode = function VNode (
   children,
   text,
   elm,
-  ns,
   context,
   componentOptions
 ) {
@@ -3659,7 +3708,7 @@ var VNode = function VNode (
   this.children = children;
   this.text = text;
   this.elm = elm;
-  this.ns = ns;
+  this.ns = undefined;
   this.context = context;
   this.functionalContext = undefined;
   this.key = data && data.key;
@@ -3674,13 +3723,17 @@ var VNode = function VNode (
   this.isOnce = false;
 };
 
-var emptyVNode = function () {
+var createEmptyVNode = function () {
   var node = new VNode();
   node.text = '';
   node.isComment = true;
   return node
 };
 
+function createTextVNode (val) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -3692,10 +3745,10 @@ function cloneVNode (vnode) {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   );
+  cloned.ns = vnode.ns;
   cloned.isStatic = vnode.isStatic;
   cloned.key = vnode.key;
   cloned.isCloned = true;
@@ -3712,146 +3765,6 @@ function cloneVNodes (vnodes) {
 
 /*  */
 
-/*  */
-
-function updateListeners (
-  on,
-  oldOn,
-  add,
-  remove$$1,
-  vm
-) {
-  var name, cur, old, fn, event, capture, once;
-  for (name in on) {
-    cur = on[name];
-    old = oldOn[name];
-    if (!cur) {
-      process.env.NODE_ENV !== 'production' && warn(
-        "Invalid handler for event \"" + name + "\": got " + String(cur),
-        vm
-      );
-    } else if (!old) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      if (Array.isArray(cur)) {
-        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
-      } else {
-        if (!cur.invoker) {
-          fn = cur;
-          cur = on[name] = {};
-          cur.fn = fn;
-          cur.invoker = fnInvoker(cur);
-        }
-        add(event, cur.invoker, once, capture);
-      }
-    } else if (cur !== old) {
-      if (Array.isArray(old)) {
-        old.length = cur.length;
-        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
-        on[name] = old;
-      } else {
-        old.fn = cur;
-        on[name] = old;
-      }
-    }
-  }
-  for (name in oldOn) {
-    if (!on[name]) {
-      once = name.charAt(0) === '~'; // Prefixed last, checked first
-      event = once ? name.slice(1) : name;
-      capture = event.charAt(0) === '!';
-      event = capture ? event.slice(1) : event;
-      remove$$1(event, oldOn[name].invoker, capture);
-    }
-  }
-}
-
-function arrInvoker (arr) {
-  return function (ev) {
-    var arguments$1 = arguments;
-
-    var single = arguments.length === 1;
-    for (var i = 0; i < arr.length; i++) {
-      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
-    }
-  }
-}
-
-function fnInvoker (o) {
-  return function (ev) {
-    var single = arguments.length === 1;
-    single ? o.fn(ev) : o.fn.apply(null, arguments);
-  }
-}
-
-/*  */
-
-function normalizeChildren (
-  children,
-  ns,
-  nestedIndex
-) {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    var res = [];
-    for (var i = 0, l = children.length; i < l; i++) {
-      var c = children[i];
-      var last = res[res.length - 1];
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, ((nestedIndex || '') + "_" + i)));
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c);
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c));
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text;
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns);
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = "__vlist" + nestedIndex + "_" + i + "__";
-          }
-          res.push(c);
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
-}
-
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns;
-    if (vnode.children) {
-      for (var i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns);
-      }
-    }
-  }
-}
-
-/*  */
-
-/*  */
-
 var activeInstance = null;
 
 function initLifecycle (vm) {
@@ -3887,7 +3800,7 @@ function lifecycleMixin (Vue) {
     var vm = this;
     vm.$el = el;
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode;
+      vm.$options.render = createEmptyVNode;
       if (process.env.NODE_ENV !== 'production') {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -4138,7 +4051,7 @@ function createComponent (
   var name = Ctor.options.name || tag;
   var vnode = new VNode(
     ("vue-component-" + (Ctor.cid) + (name ? ("-" + name) : '')),
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor: Ctor, propsData: propsData, listeners: listeners, tag: tag, children: children }
   );
   return vnode
@@ -4158,19 +4071,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData);
     }
   }
-  var vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind(createElement, { _self: Object.create(context) }),
-    {
-      props: props,
-      data: data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: function () { return resolveSlots(children, context); }
-    }
-  );
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  var _context = Object.create(context);
+  var h = function (a, b, c, d) { return createElement(_context, a, b, c, d, true); };
+  var vnode = Ctor.options.render.call(null, h, {
+    props: props,
+    data: data,
+    parent: context,
+    children: children,
+    slots: function () { return resolveSlots(children, context); }
+  });
   if (vnode instanceof VNode) {
     vnode.functionalContext = context;
     if (data.slot) {
@@ -4381,26 +4292,151 @@ function mergeHook$1 (one, two) {
 
 /*  */
 
+/*  */
+
+function updateListeners (
+  on,
+  oldOn,
+  add,
+  remove$$1,
+  vm
+) {
+  var name, cur, old, fn, event, capture, once;
+  for (name in on) {
+    cur = on[name];
+    old = oldOn[name];
+    if (!cur) {
+      process.env.NODE_ENV !== 'production' && warn(
+        "Invalid handler for event \"" + name + "\": got " + String(cur),
+        vm
+      );
+    } else if (!old) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      if (Array.isArray(cur)) {
+        add(event, (cur.invoker = arrInvoker(cur)), once, capture);
+      } else {
+        if (!cur.invoker) {
+          fn = cur;
+          cur = on[name] = {};
+          cur.fn = fn;
+          cur.invoker = fnInvoker(cur);
+        }
+        add(event, cur.invoker, once, capture);
+      }
+    } else if (cur !== old) {
+      if (Array.isArray(old)) {
+        old.length = cur.length;
+        for (var i = 0; i < old.length; i++) { old[i] = cur[i]; }
+        on[name] = old;
+      } else {
+        old.fn = cur;
+        on[name] = old;
+      }
+    }
+  }
+  for (name in oldOn) {
+    if (!on[name]) {
+      once = name.charAt(0) === '~'; // Prefixed last, checked first
+      event = once ? name.slice(1) : name;
+      capture = event.charAt(0) === '!';
+      event = capture ? event.slice(1) : event;
+      remove$$1(event, oldOn[name].invoker, capture);
+    }
+  }
+}
+
+function arrInvoker (arr) {
+  return function (ev) {
+    var arguments$1 = arguments;
+
+    var single = arguments.length === 1;
+    for (var i = 0; i < arr.length; i++) {
+      single ? arr[i](ev) : arr[i].apply(null, arguments$1);
+    }
+  }
+}
+
+function fnInvoker (o) {
+  return function (ev) {
+    var single = arguments.length === 1;
+    single ? o.fn(ev) : o.fn.apply(null, arguments);
+  }
+}
+
+/*  */
+
+function normalizeChildren (children) {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
+}
+
+function normalizeArrayChildren (children, nestedIndex) {
+  var res = [];
+  var i, c, last;
+  for (i = 0; i < children.length; i++) {
+    c = children[i];
+    if (c == null) { continue }
+    last = res[res.length - 1];
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, ((nestedIndex || '') + "_" + i)));
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c);
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c));
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text);
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = "__vlist" + nestedIndex + "_" + i + "__";
+        }
+        res.push(c);
+      }
+    }
+  }
+  return res
+}
+
+/*  */
+
+/*  */
+
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 function createElement (
+  context,
   tag,
   data,
-  children
+  children,
+  needNormalization,
+  alwaysNormalize
 ) {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children;
     children = data;
     data = undefined;
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) { needNormalization = true; }
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 function _createElement (
   context,
   tag,
   data,
-  children
+  children,
+  needNormalization
 ) {
   if (data && data.__ob__) {
     process.env.NODE_ENV !== 'production' && warn(
@@ -4408,11 +4444,11 @@ function _createElement (
       'Always create fresh vnode data objects in each render!',
       context
     );
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -4421,31 +4457,53 @@ function _createElement (
     data.scopedSlots = { default: children[0] };
     children.length = 0;
   }
+  if (needNormalization) {
+    children = normalizeChildren(children);
+  }
+  var vnode, ns;
   if (typeof tag === 'string') {
     var Ctor;
-    var ns = config.getTagNamespace(tag);
+    ns = config.getTagNamespace(tag);
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
-      )
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
+      );
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag);
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      var childNs = tag === 'foreignObject' ? 'xhtml' : ns;
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
-      )
+      ns = tag === 'foreignObject' ? 'xhtml' : ns;
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
+      );
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children);
+  }
+  if (vnode) {
+    if (ns) { applyNS(vnode, ns); }
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns;
+  if (vnode.children) {
+    for (var i = 0, l = vnode.children.length; i < l; i++) {
+      var child = vnode.children[i];
+      if (child.tag && !child.ns) {
+        applyNS(child, ns);
+      }
+    }
   }
 }
 
@@ -4459,9 +4517,14 @@ function initRender (vm) {
   var renderContext = parentVnode && parentVnode.context;
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext);
   vm.$scopedSlots = {};
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind(createElement, vm);
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = function (a, b, c, d) { return createElement(vm, a, b, c, d, false); };
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = function (a, b, c, d) { return createElement(vm, a, b, c, d, true); };
   if (vm.$options.el) {
     vm.$mount(vm.$options.el);
   }
@@ -4522,21 +4585,21 @@ function renderMixin (Vue) {
           vm
         );
       }
-      vnode = emptyVNode();
+      vnode = createEmptyVNode();
     }
     // set parent
     vnode.parent = _parentVnode;
     return vnode
   };
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement;
   // toString for mustaches
   Vue.prototype._s = _toString;
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode;
   // number conversion
   Vue.prototype._n = toNumber;
   // empty vnode
-  Vue.prototype._e = emptyVNode;
+  Vue.prototype._e = createEmptyVNode;
   // loose equal
   Vue.prototype._q = looseEqual;
   // loose indexOf
@@ -4590,7 +4653,6 @@ function renderMixin (Vue) {
   }
 
   // filter resolution helper
-  var identity = function (_) { return _; };
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   };
@@ -4694,14 +4756,13 @@ function renderMixin (Vue) {
 }
 
 function resolveSlots (
-  renderChildren,
+  children,
   context
 ) {
   var slots = {};
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  var children = normalizeChildren(renderChildren) || [];
   var defaultSlot = [];
   var name, child;
   for (var i = 0, l = children.length; i < l; i++) {
@@ -5209,11 +5270,14 @@ function resolveAsset (
     return
   }
   var assets = options[type];
-  var res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))];
+  // check local registration variations first
+  if (hasOwn(assets, id)) { return assets[id] }
+  var camelizedId = camelize(id);
+  if (hasOwn(assets, camelizedId)) { return assets[camelizedId] }
+  var PascalCaseId = capitalize(camelizedId);
+  if (hasOwn(assets, PascalCaseId)) { return assets[PascalCaseId] }
+  // fallback to prototype chain
+  var res = assets[id] || assets[camelizedId] || assets[PascalCaseId];
   if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
@@ -5395,9 +5459,10 @@ function isBooleanType (fn) {
 /*  */
 
 // attributes that should be using props for binding
+var acceptValue = makeMap('input,textarea,option,select');
 var mustUseProp = function (tag, attr) {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
diff --git a/packages/vue-template-compiler/package.json b/packages/vue-template-compiler/package.json
index 0618dec5f28..44720402bce 100644
--- a/packages/vue-template-compiler/package.json
+++ b/packages/vue-template-compiler/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-template-compiler",
-  "version": "2.1.4",
+  "version": "2.1.5",
   "description": "template compiler for Vue 2.0",
   "main": "index.js",
   "repository": {
diff --git a/src/compiler/codegen/index.js b/src/compiler/codegen/index.js
index 7f3749e9f56..ac77405001f 100644
--- a/src/compiler/codegen/index.js
+++ b/src/compiler/codegen/index.js
@@ -31,7 +31,7 @@ export function generate (
   transforms = pluckModuleFunction(options.modules, 'transformCode')
   dataGenFns = pluckModuleFunction(options.modules, 'genData')
   platformDirectives = options.directives || {}
-  const code = ast ? genElement(ast) : '_h("div")'
+  const code = ast ? genElement(ast) : '_c("div")'
   staticRenderFns = prevStaticRenderFns
   onceCount = prevOnceCount
   return {
@@ -61,8 +61,8 @@ function genElement (el: ASTElement): string {
     } else {
       const data = el.plain ? undefined : genData(el)
 
-      const children = el.inlineTemplate ? null : genChildren(el)
-      code = `_h('${el.tag}'${
+      const children = el.inlineTemplate ? null : genChildren(el, true)
+      code = `_c('${el.tag}'${
         data ? `,${data}` : '' // data
       }${
         children ? `,${children}` : '' // children
@@ -276,12 +276,36 @@ function genScopedSlot (key: string, el: ASTElement) {
   }}`
 }
 
-function genChildren (el: ASTElement): string | void {
-  if (el.children.length) {
-    return '[' + el.children.map(genNode).join(',') + ']'
+function genChildren (el: ASTElement, checkSkip?: boolean): string | void {
+  const children = el.children
+  if (children.length) {
+    const el: any = children[0]
+    // optimize single v-for
+    if (children.length === 1 &&
+        el.for &&
+        el.tag !== 'template' &&
+        el.tag !== 'slot') {
+      return genElement(el)
+    }
+    return `[${children.map(genNode).join(',')}]${
+      checkSkip
+        ? canSkipNormalization(children) ? '' : ',true'
+        : ''
+    }`
   }
 }
 
+function canSkipNormalization (children): boolean {
+  for (let i = 0; i < children.length; i++) {
+    const el: any = children[i]
+    if (el.for || el.tag === 'template' || el.tag === 'slot' ||
+      (el.if && el.ifConditions.some(c => c.tag === 'template'))) {
+      return false
+    }
+  }
+  return true
+}
+
 function genNode (node: ASTNode) {
   if (node.type === 1) {
     return genElement(node)
@@ -291,9 +315,10 @@ function genNode (node: ASTNode) {
 }
 
 function genText (text: ASTText | ASTExpression): string {
-  return text.type === 2
+  return `_v(${text.type === 2
     ? text.expression // no need for () because already wrapped in _s()
     : transformSpecialNewlines(JSON.stringify(text.text))
+  })`
 }
 
 function genSlot (el: ASTElement): string {
@@ -310,8 +335,8 @@ function genSlot (el: ASTElement): string {
 
 // componentName is el.component, take it as argument to shun flow's pessimistic refinement
 function genComponent (componentName, el): string {
-  const children = el.inlineTemplate ? null : genChildren(el)
-  return `_h(${componentName},${genData(el)}${
+  const children = el.inlineTemplate ? null : genChildren(el, true)
+  return `_c(${componentName},${genData(el)}${
     children ? `,${children}` : ''
   })`
 }
diff --git a/src/compiler/parser/filter-parser.js b/src/compiler/parser/filter-parser.js
index 8e0fb0cdcf9..b63fa4086ad 100644
--- a/src/compiler/parser/filter-parser.js
+++ b/src/compiler/parser/filter-parser.js
@@ -40,7 +40,6 @@ export function parseFilters (exp: string): string {
         case 0x22: inDouble = true; break         // "
         case 0x27: inSingle = true; break         // '
         case 0x60: inTemplateString = true; break // `
-        case 0x2f: inRegex = true; break          // /
         case 0x28: paren++; break                 // (
         case 0x29: paren--; break                 // )
         case 0x5B: square++; break                // [
@@ -48,6 +47,18 @@ export function parseFilters (exp: string): string {
         case 0x7B: curly++; break                 // {
         case 0x7D: curly--; break                 // }
       }
+      if (c === 0x2f) { // /
+        let j = i - 1
+        let p
+        // find first non-whitespace prev char
+        for (; j >= 0; j--) {
+          p = exp.charAt(j)
+          if (p !== ' ') break
+        }
+        if (!p || !/[\w$]/.test(p)) {
+          inRegex = true
+        }
+      }
     }
   }
 
diff --git a/src/compiler/parser/index.js b/src/compiler/parser/index.js
index e0d44141538..81e0e2e92ba 100644
--- a/src/compiler/parser/index.js
+++ b/src/compiler/parser/index.js
@@ -414,6 +414,7 @@ function processAttrs (el) {
       if (bindRE.test(name)) { // v-bind
         name = name.replace(bindRE, '')
         value = parseFilters(value)
+        isProp = false
         if (modifiers) {
           if (modifiers.prop) {
             isProp = true
diff --git a/src/core/config.js b/src/core/config.js
index 6edff53d3a0..823ca964473 100644
--- a/src/core/config.js
+++ b/src/core/config.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { no, noop } from 'shared/util'
+import { no, noop, identity } from 'shared/util'
 
 export type Config = {
   // user
@@ -12,6 +12,7 @@ export type Config = {
   keyCodes: { [key: string]: number };
   // platform
   isReservedTag: (x?: string) => boolean;
+  parsePlatformTagName: (x: string) => string;
   isUnknownElement: (x?: string) => boolean;
   getTagNamespace: (x?: string) => string | void;
   mustUseProp: (tag?: string, x?: string) => boolean;
@@ -69,6 +70,11 @@ const config: Config = {
    */
   getTagNamespace: noop,
 
+  /**
+   * Parse the real tag name for the specific platform.
+   */
+  parsePlatformTagName: identity,
+
   /**
    * Check if an attribute must be bound using property, e.g. value
    * Platform-dependent.
diff --git a/src/core/global-api/extend.js b/src/core/global-api/extend.js
index e0027c3076e..c6cae8ece04 100644
--- a/src/core/global-api/extend.js
+++ b/src/core/global-api/extend.js
@@ -28,7 +28,8 @@ export function initExtend (Vue: GlobalAPI) {
       if (!/^[a-zA-Z][\w-]*$/.test(name)) {
         warn(
           'Invalid component name: "' + name + '". Component names ' +
-          'can only contain alphanumeric characaters and the hyphen.'
+          'can only contain alphanumeric characters and the hyphen, ' +
+          'and must start with a letter.'
         )
       }
     }
diff --git a/src/core/index.js b/src/core/index.js
index f2f1459bef3..c5814471e0b 100644
--- a/src/core/index.js
+++ b/src/core/index.js
@@ -8,6 +8,6 @@ Object.defineProperty(Vue.prototype, '$isServer', {
   get: isServerRendering
 })
 
-Vue.version = '2.1.4'
+Vue.version = '__VERSION__'
 
 export default Vue
diff --git a/src/core/instance/lifecycle.js b/src/core/instance/lifecycle.js
index 11cd909a1de..8d5549a9426 100644
--- a/src/core/instance/lifecycle.js
+++ b/src/core/instance/lifecycle.js
@@ -1,7 +1,7 @@
 /* @flow */
 
 import Watcher from '../observer/watcher'
-import { emptyVNode } from '../vdom/vnode'
+import { createEmptyVNode } from '../vdom/vnode'
 import { observerState } from '../observer/index'
 import { warn, validateProp, remove, noop } from '../util/index'
 import { resolveSlots } from './render'
@@ -41,7 +41,7 @@ export function lifecycleMixin (Vue: Class<Component>) {
     const vm: Component = this
     vm.$el = el
     if (!vm.$options.render) {
-      vm.$options.render = emptyVNode
+      vm.$options.render = createEmptyVNode
       if (process.env.NODE_ENV !== 'production') {
         /* istanbul ignore if */
         if (vm.$options.template && vm.$options.template.charAt(0) !== '#') {
@@ -117,7 +117,7 @@ export function lifecycleMixin (Vue: Class<Component>) {
     propsData: ?Object,
     listeners: ?Object,
     parentVnode: VNode,
-    renderChildren: ?VNodeChildren
+    renderChildren: ?Array<VNode>
   ) {
     const vm: Component = this
     const hasChildren = !!(vm.$options._renderChildren || renderChildren)
diff --git a/src/core/instance/render.js b/src/core/instance/render.js
index e14eebc3ae7..f3cbfb3e86d 100644
--- a/src/core/instance/render.js
+++ b/src/core/instance/render.js
@@ -1,11 +1,24 @@
 /* @flow */
 
 import config from '../config'
-import VNode, { emptyVNode, cloneVNode, cloneVNodes } from '../vdom/vnode'
-import { normalizeChildren } from '../vdom/helpers/index'
+import VNode, {
+  cloneVNode,
+  cloneVNodes,
+  createTextVNode,
+  createEmptyVNode
+} from '../vdom/vnode'
 import {
-  warn, formatComponentName, bind, isObject, toObject,
-  nextTick, resolveAsset, _toString, toNumber, looseEqual, looseIndexOf
+  warn,
+  identity,
+  isObject,
+  toObject,
+  nextTick,
+  toNumber,
+  _toString,
+  looseEqual,
+  looseIndexOf,
+  resolveAsset,
+  formatComponentName
 } from '../util/index'
 
 import { createElement } from '../vdom/create-element'
@@ -18,9 +31,14 @@ export function initRender (vm: Component) {
   const renderContext = parentVnode && parentVnode.context
   vm.$slots = resolveSlots(vm.$options._renderChildren, renderContext)
   vm.$scopedSlots = {}
-  // bind the public createElement fn to this instance
+  // bind the createElement fn to this instance
   // so that we get proper render context inside it.
-  vm.$createElement = bind(createElement, vm)
+  // args order: tag, data, children, needNormalization, alwaysNormalize
+  // internal version is used by render functions compiled from templates
+  vm._c = (a, b, c, d) => createElement(vm, a, b, c, d, false)
+  // normalization is always applied for the public version, used in
+  // user-written render functions.
+  vm.$createElement = (a, b, c, d) => createElement(vm, a, b, c, d, true)
   if (vm.$options.el) {
     vm.$mount(vm.$options.el)
   }
@@ -82,21 +100,21 @@ export function renderMixin (Vue: Class<Component>) {
           vm
         )
       }
-      vnode = emptyVNode()
+      vnode = createEmptyVNode()
     }
     // set parent
     vnode.parent = _parentVnode
     return vnode
   }
 
-  // shorthands used in render functions
-  Vue.prototype._h = createElement
   // toString for mustaches
   Vue.prototype._s = _toString
+  // convert text to vnode
+  Vue.prototype._v = createTextVNode
   // number conversion
   Vue.prototype._n = toNumber
   // empty vnode
-  Vue.prototype._e = emptyVNode
+  Vue.prototype._e = createEmptyVNode
   // loose equal
   Vue.prototype._q = looseEqual
   // loose indexOf
@@ -150,7 +168,6 @@ export function renderMixin (Vue: Class<Component>) {
   }
 
   // filter resolution helper
-  const identity = _ => _
   Vue.prototype._f = function resolveFilter (id) {
     return resolveAsset(this.$options, 'filters', id, true) || identity
   }
@@ -254,14 +271,13 @@ export function renderMixin (Vue: Class<Component>) {
 }
 
 export function resolveSlots (
-  renderChildren: ?VNodeChildren,
+  children: ?Array<VNode>,
   context: ?Component
 ): { [key: string]: Array<VNode> } {
   const slots = {}
-  if (!renderChildren) {
+  if (!children) {
     return slots
   }
-  const children = normalizeChildren(renderChildren) || []
   const defaultSlot = []
   let name, child
   for (let i = 0, l = children.length; i < l; i++) {
diff --git a/src/core/instance/state.js b/src/core/instance/state.js
index 037e7b77835..15b3f92cffb 100644
--- a/src/core/instance/state.js
+++ b/src/core/instance/state.js
@@ -77,7 +77,8 @@ function initData (vm: Component) {
   if (!isPlainObject(data)) {
     data = {}
     process.env.NODE_ENV !== 'production' && warn(
-      'data functions should return an object.',
+      'data functions should return an object:\n' +
+      'https://vuejs.org/v2/guide/components.html#data-Must-Be-a-Function',
       vm
     )
   }
diff --git a/src/core/observer/index.js b/src/core/observer/index.js
index 1f3d3479ba0..447430cc3d8 100644
--- a/src/core/observer/index.js
+++ b/src/core/observer/index.js
@@ -89,9 +89,8 @@ function protoAugment (target, src: Object) {
 /**
  * Augment an target Object or Array by defining
  * hidden properties.
- *
- * istanbul ignore next
  */
+/* istanbul ignore next */
 function copyAugment (target: Object, src: Object, keys: Array<string>) {
   for (let i = 0, l = keys.length; i < l; i++) {
     const key = keys[i]
diff --git a/src/core/util/env.js b/src/core/util/env.js
index 902f3c1efce..206fc4a2643 100644
--- a/src/core/util/env.js
+++ b/src/core/util/env.js
@@ -132,10 +132,10 @@ if (typeof Set !== 'undefined' && isNative(Set)) {
       this.set = Object.create(null)
     }
     has (key: string | number) {
-      return this.set[key] !== undefined
+      return this.set[key] === true
     }
     add (key: string | number) {
-      this.set[key] = 1
+      this.set[key] = true
     }
     clear () {
       this.set = Object.create(null)
diff --git a/src/core/util/options.js b/src/core/util/options.js
index 7981d11e687..c3f0d3c57a8 100644
--- a/src/core/util/options.js
+++ b/src/core/util/options.js
@@ -319,11 +319,14 @@ export function resolveAsset (
     return
   }
   const assets = options[type]
-  const res = assets[id] ||
-    // camelCase ID
-    assets[camelize(id)] ||
-    // Pascal Case ID
-    assets[capitalize(camelize(id))]
+  // check local registration variations first
+  if (hasOwn(assets, id)) return assets[id]
+  const camelizedId = camelize(id)
+  if (hasOwn(assets, camelizedId)) return assets[camelizedId]
+  const PascalCaseId = capitalize(camelizedId)
+  if (hasOwn(assets, PascalCaseId)) return assets[PascalCaseId]
+  // fallback to prototype chain
+  const res = assets[id] || assets[camelizedId] || assets[PascalCaseId]
   if (process.env.NODE_ENV !== 'production' && warnMissing && !res) {
     warn(
       'Failed to resolve ' + type.slice(0, -1) + ': ' + id,
diff --git a/src/core/vdom/create-component.js b/src/core/vdom/create-component.js
index 52966777eb8..8833cd5c4e8 100644
--- a/src/core/vdom/create-component.js
+++ b/src/core/vdom/create-component.js
@@ -1,12 +1,11 @@
 /* @flow */
 
 import VNode from './vnode'
-import { normalizeChildren } from './helpers/index'
 import { resolveConstructorOptions } from '../instance/init'
 import { activeInstance, callHook } from '../instance/lifecycle'
 import { resolveSlots } from '../instance/render'
 import { createElement } from './create-element'
-import { warn, isObject, hasOwn, hyphenate, validateProp, bind } from '../util/index'
+import { warn, isObject, hasOwn, hyphenate, validateProp } from '../util/index'
 
 const hooks = { init, prepatch, insert, destroy }
 const hooksToMerge = Object.keys(hooks)
@@ -15,7 +14,7 @@ export function createComponent (
   Ctor: Class<Component> | Function | Object | void,
   data?: VNodeData,
   context: Component,
-  children?: VNodeChildren,
+  children: ?Array<VNode>,
   tag?: string
 ): VNode | void {
   if (!Ctor) {
@@ -85,7 +84,7 @@ export function createComponent (
   const name = Ctor.options.name || tag
   const vnode = new VNode(
     `vue-component-${Ctor.cid}${name ? `-${name}` : ''}`,
-    data, undefined, undefined, undefined, undefined, context,
+    data, undefined, undefined, undefined, context,
     { Ctor, propsData, listeners, tag, children }
   )
   return vnode
@@ -96,7 +95,7 @@ function createFunctionalComponent (
   propsData: ?Object,
   data: VNodeData,
   context: Component,
-  children?: VNodeChildren
+  children: ?Array<VNode>
 ): VNode | void {
   const props = {}
   const propOptions = Ctor.options.props
@@ -105,19 +104,17 @@ function createFunctionalComponent (
       props[key] = validateProp(key, propOptions, propsData)
     }
   }
-  const vnode = Ctor.options.render.call(
-    null,
-    // ensure the createElement function in functional components
-    // gets a unique context - this is necessary for correct named slot check
-    bind(createElement, { _self: Object.create(context) }),
-    {
-      props,
-      data,
-      parent: context,
-      children: normalizeChildren(children),
-      slots: () => resolveSlots(children, context)
-    }
-  )
+  // ensure the createElement function in functional components
+  // gets a unique context - this is necessary for correct named slot check
+  const _context = Object.create(context)
+  const h = (a, b, c, d) => createElement(_context, a, b, c, d, true)
+  const vnode = Ctor.options.render.call(null, h, {
+    props,
+    data,
+    parent: context,
+    children,
+    slots: () => resolveSlots(children, context)
+  })
   if (vnode instanceof VNode) {
     vnode.functionalContext = context
     if (data.slot) {
diff --git a/src/core/vdom/create-element.js b/src/core/vdom/create-element.js
index bf4026b51bb..cc041a7513a 100644
--- a/src/core/vdom/create-element.js
+++ b/src/core/vdom/create-element.js
@@ -1,43 +1,48 @@
 /* @flow */
 
-import VNode, { emptyVNode } from './vnode'
+import VNode, { createEmptyVNode } from './vnode'
 import config from '../config'
 import { createComponent } from './create-component'
 import { normalizeChildren } from './helpers/index'
-import { warn, resolveAsset } from '../util/index'
+import { warn, resolveAsset, isPrimitive } from '../util/index'
 
 // wrapper function for providing a more flexible interface
 // without getting yelled at by flow
 export function createElement (
+  context: Component,
   tag: any,
   data: any,
-  children: any
-): VNode | void {
-  if (data && (Array.isArray(data) || typeof data !== 'object')) {
+  children: any,
+  needNormalization: any,
+  alwaysNormalize: boolean
+): VNode {
+  if (Array.isArray(data) || isPrimitive(data)) {
+    needNormalization = children
     children = data
     data = undefined
   }
-  // make sure to use real instance instead of proxy as context
-  return _createElement(this._self, tag, data, children)
+  if (alwaysNormalize) needNormalization = true
+  return _createElement(context, tag, data, children, needNormalization)
 }
 
 export function _createElement (
   context: Component,
   tag?: string | Class<Component> | Function | Object,
   data?: VNodeData,
-  children?: VNodeChildren | void
-): VNode | void {
+  children?: any,
+  needNormalization?: boolean
+): VNode {
   if (data && data.__ob__) {
     process.env.NODE_ENV !== 'production' && warn(
       `Avoid using observed data object as vnode data: ${JSON.stringify(data)}\n` +
       'Always create fresh vnode data objects in each render!',
       context
     )
-    return
+    return createEmptyVNode()
   }
   if (!tag) {
     // in case of component :is set to falsy value
-    return emptyVNode()
+    return createEmptyVNode()
   }
   // support single function children as default scoped slot
   if (Array.isArray(children) &&
@@ -46,30 +51,52 @@ export function _createElement (
     data.scopedSlots = { default: children[0] }
     children.length = 0
   }
+  if (needNormalization) {
+    children = normalizeChildren(children)
+  }
+  let vnode, ns
   if (typeof tag === 'string') {
     let Ctor
-    const ns = config.getTagNamespace(tag)
+    ns = config.getTagNamespace(tag)
     if (config.isReservedTag(tag)) {
       // platform built-in elements
-      return new VNode(
-        tag, data, normalizeChildren(children, ns),
-        undefined, undefined, ns, context
+      vnode = new VNode(
+        config.parsePlatformTagName(tag), data, children,
+        undefined, undefined, context
       )
     } else if ((Ctor = resolveAsset(context.$options, 'components', tag))) {
       // component
-      return createComponent(Ctor, data, context, children, tag)
+      vnode = createComponent(Ctor, data, context, children, tag)
     } else {
       // unknown or unlisted namespaced elements
       // check at runtime because it may get assigned a namespace when its
       // parent normalizes children
-      const childNs = tag === 'foreignObject' ? 'xhtml' : ns
-      return new VNode(
-        tag, data, normalizeChildren(children, childNs),
-        undefined, undefined, ns, context
+      ns = tag === 'foreignObject' ? 'xhtml' : ns
+      vnode = new VNode(
+        tag, data, children,
+        undefined, undefined, context
       )
     }
   } else {
     // direct component options / constructor
-    return createComponent(tag, data, context, children)
+    vnode = createComponent(tag, data, context, children)
+  }
+  if (vnode) {
+    if (ns) applyNS(vnode, ns)
+    return vnode
+  } else {
+    return createEmptyVNode()
+  }
+}
+
+function applyNS (vnode, ns) {
+  vnode.ns = ns
+  if (vnode.children) {
+    for (let i = 0, l = vnode.children.length; i < l; i++) {
+      const child = vnode.children[i]
+      if (child.tag && !child.ns) {
+        applyNS(child, ns)
+      }
+    }
   }
 }
diff --git a/src/core/vdom/helpers/normalize-children.js b/src/core/vdom/helpers/normalize-children.js
index 6cc83412840..3994f180469 100644
--- a/src/core/vdom/helpers/normalize-children.js
+++ b/src/core/vdom/helpers/normalize-children.js
@@ -1,64 +1,44 @@
 /* @flow */
 
 import { isPrimitive } from 'core/util/index'
-import VNode from 'core/vdom/vnode'
+import VNode, { createTextVNode } from 'core/vdom/vnode'
 
-export function normalizeChildren (
-  children: any,
-  ns: string | void,
-  nestedIndex: string | void
-): Array<VNode> | void {
-  if (isPrimitive(children)) {
-    return [createTextVNode(children)]
-  }
-  if (Array.isArray(children)) {
-    const res = []
-    for (let i = 0, l = children.length; i < l; i++) {
-      const c = children[i]
-      const last = res[res.length - 1]
-      //  nested
-      if (Array.isArray(c)) {
-        res.push.apply(res, normalizeChildren(c, ns, `${nestedIndex || ''}_${i}`))
-      } else if (isPrimitive(c)) {
-        if (last && last.text) {
-          last.text += String(c)
-        } else if (c !== '') {
-          // convert primitive to vnode
-          res.push(createTextVNode(c))
-        }
-      } else if (c instanceof VNode) {
-        if (c.text && last && last.text) {
-          if (!last.isCloned) {
-            last.text += c.text
-          }
-        } else {
-          // inherit parent namespace
-          if (ns) {
-            applyNS(c, ns)
-          }
-          // default key for nested array children (likely generated by v-for)
-          if (c.tag && c.key == null && nestedIndex != null) {
-            c.key = `__vlist${nestedIndex}_${i}__`
-          }
-          res.push(c)
-        }
-      }
-    }
-    return res
-  }
-}
-
-function createTextVNode (val) {
-  return new VNode(undefined, undefined, undefined, String(val))
+export function normalizeChildren (children: any): ?Array<VNode> {
+  return isPrimitive(children)
+    ? [createTextVNode(children)]
+    : Array.isArray(children)
+      ? normalizeArrayChildren(children)
+      : undefined
 }
 
-function applyNS (vnode, ns) {
-  if (vnode.tag && !vnode.ns) {
-    vnode.ns = ns
-    if (vnode.children) {
-      for (let i = 0, l = vnode.children.length; i < l; i++) {
-        applyNS(vnode.children[i], ns)
+function normalizeArrayChildren (children: any, nestedIndex?: string): Array<VNode> {
+  const res = []
+  let i, c, last
+  for (i = 0; i < children.length; i++) {
+    c = children[i]
+    if (c == null) continue
+    last = res[res.length - 1]
+    //  nested
+    if (Array.isArray(c)) {
+      res.push.apply(res, normalizeArrayChildren(c, `${nestedIndex || ''}_${i}`))
+    } else if (isPrimitive(c)) {
+      if (last && last.text) {
+        last.text += String(c)
+      } else if (c !== '') {
+        // convert primitive to vnode
+        res.push(createTextVNode(c))
+      }
+    } else {
+      if (c.text && last && last.text) {
+        res[res.length - 1] = createTextVNode(last.text + c.text)
+      } else {
+        // default key for nested array children (likely generated by v-for)
+        if (c.tag && c.key == null && nestedIndex != null) {
+          c.key = `__vlist${nestedIndex}_${i}__`
+        }
+        res.push(c)
       }
     }
   }
+  return res
 }
diff --git a/src/core/vdom/modules/directives.js b/src/core/vdom/modules/directives.js
index 230bbebab4b..fb88e8fc7fb 100644
--- a/src/core/vdom/modules/directives.js
+++ b/src/core/vdom/modules/directives.js
@@ -12,13 +12,13 @@ export default {
   }
 }
 
-function updateDirectives (
-  oldVnode: VNodeWithData,
-  vnode: VNodeWithData
-) {
-  if (!oldVnode.data.directives && !vnode.data.directives) {
-    return
+function updateDirectives (oldVnode: VNodeWithData, vnode: VNodeWithData) {
+  if (oldVnode.data.directives || vnode.data.directives) {
+    _update(oldVnode, vnode)
   }
+}
+
+function _update (oldVnode, vnode) {
   const isCreate = oldVnode === emptyNode
   const oldDirs = normalizeDirectives(oldVnode.data.directives, oldVnode.context)
   const newDirs = normalizeDirectives(vnode.data.directives, vnode.context)
@@ -48,9 +48,9 @@ function updateDirectives (
 
   if (dirsWithInsert.length) {
     const callInsert = () => {
-      dirsWithInsert.forEach(dir => {
-        callHook(dir, 'inserted', vnode, oldVnode)
-      })
+      for (let i = 0; i < dirsWithInsert.length; i++) {
+        callHook(dirsWithInsert[i], 'inserted', vnode, oldVnode)
+      }
     }
     if (isCreate) {
       mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'insert', callInsert, 'dir-insert')
@@ -61,9 +61,9 @@ function updateDirectives (
 
   if (dirsWithPostpatch.length) {
     mergeVNodeHook(vnode.data.hook || (vnode.data.hook = {}), 'postpatch', () => {
-      dirsWithPostpatch.forEach(dir => {
-        callHook(dir, 'componentUpdated', vnode, oldVnode)
-      })
+      for (let i = 0; i < dirsWithPostpatch.length; i++) {
+        callHook(dirsWithPostpatch[i], 'componentUpdated', vnode, oldVnode)
+      }
     }, 'dir-postpatch')
   }
 
diff --git a/src/core/vdom/patch.js b/src/core/vdom/patch.js
index 9b43eecf284..ec69b4d4144 100644
--- a/src/core/vdom/patch.js
+++ b/src/core/vdom/patch.js
@@ -14,7 +14,7 @@
 
 import config from '../config'
 import VNode from './vnode'
-import { isPrimitive, _toString, warn } from '../util/index'
+import { makeMap, isPrimitive, _toString, warn } from '../util/index'
 import { activeInstance } from '../instance/lifecycle'
 import { registerRef } from './modules/ref'
 
@@ -202,7 +202,11 @@ export function createPatchFunction (backend) {
 
   function insert (parent, elm, ref) {
     if (parent) {
-      nodeOps.insertBefore(parent, elm, ref)
+      if (ref) {
+        nodeOps.insertBefore(parent, elm, ref)
+      } else {
+        nodeOps.appendChild(parent, elm)
+      }
     }
   }
 
@@ -382,15 +386,15 @@ export function createPatchFunction (backend) {
               'Make sure each v-for item has a unique key.'
             )
           }
-          if (elmToMove.tag !== newStartVnode.tag) {
-            // same key but different element. treat as new element
-            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm)
-            newStartVnode = newCh[++newStartIdx]
-          } else {
+          if (sameVnode(elmToMove, newStartVnode)) {
             patchVnode(elmToMove, newStartVnode, insertedVnodeQueue)
             oldCh[idxInOld] = undefined
             canMove && nodeOps.insertBefore(parentElm, newStartVnode.elm, oldStartVnode.elm)
             newStartVnode = newCh[++newStartIdx]
+          } else {
+            // same key but different element. treat as new element
+            createElm(newStartVnode, insertedVnodeQueue, parentElm, oldStartVnode.elm)
+            newStartVnode = newCh[++newStartIdx]
           }
         }
       }
@@ -464,6 +468,11 @@ export function createPatchFunction (backend) {
   }
 
   let bailed = false
+  // list of modules that can skip create hook during hydration because they
+  // are already rendered on the client or has no need for initialization
+  const isRenderedModule = makeMap('attrs,style,class,staticClass,staticStyle,key')
+
+  // Note: this is a browser-only function so we can assume elms are DOM nodes.
   function hydrate (elm, vnode, insertedVnodeQueue) {
     if (process.env.NODE_ENV !== 'production') {
       if (!assertNodeMatch(elm, vnode)) {
@@ -482,36 +491,40 @@ export function createPatchFunction (backend) {
     }
     if (isDef(tag)) {
       if (isDef(children)) {
-        const childNodes = nodeOps.childNodes(elm)
         // empty element, allow client to pick up and populate children
-        if (!childNodes.length) {
+        if (!elm.hasChildNodes()) {
           createChildren(vnode, children, insertedVnodeQueue)
         } else {
           let childrenMatch = true
-          if (childNodes.length !== children.length) {
-            childrenMatch = false
-          } else {
-            for (let i = 0; i < children.length; i++) {
-              if (!hydrate(childNodes[i], children[i], insertedVnodeQueue)) {
-                childrenMatch = false
-                break
-              }
+          let childNode = elm.firstChild
+          for (let i = 0; i < children.length; i++) {
+            if (!childNode || !hydrate(childNode, children[i], insertedVnodeQueue)) {
+              childrenMatch = false
+              break
             }
+            childNode = childNode.nextSibling
           }
-          if (!childrenMatch) {
+          // if childNode is not null, it means the actual childNodes list is
+          // longer than the virtual children list.
+          if (!childrenMatch || childNode) {
             if (process.env.NODE_ENV !== 'production' &&
                 typeof console !== 'undefined' &&
                 !bailed) {
               bailed = true
               console.warn('Parent: ', elm)
-              console.warn('Mismatching childNodes vs. VNodes: ', childNodes, children)
+              console.warn('Mismatching childNodes vs. VNodes: ', elm.childNodes, children)
             }
             return false
           }
         }
       }
       if (isDef(data)) {
-        invokeCreateHooks(vnode, insertedVnodeQueue)
+        for (const key in data) {
+          if (!isRenderedModule(key)) {
+            invokeCreateHooks(vnode, insertedVnodeQueue)
+            break
+          }
+        }
       }
     }
     return true
@@ -521,7 +534,7 @@ export function createPatchFunction (backend) {
     if (vnode.tag) {
       return (
         vnode.tag.indexOf('vue-component') === 0 ||
-        vnode.tag.toLowerCase() === nodeOps.tagName(node).toLowerCase()
+        vnode.tag.toLowerCase() === (node.tagName && node.tagName.toLowerCase())
       )
     } else {
       return _toString(vnode.text) === node.data
diff --git a/src/core/vdom/vnode.js b/src/core/vdom/vnode.js
index 869a0a4b8cc..49d8e4b6662 100644
--- a/src/core/vdom/vnode.js
+++ b/src/core/vdom/vnode.js
@@ -3,7 +3,7 @@
 export default class VNode {
   tag: string | void;
   data: VNodeData | void;
-  children: Array<VNode> | void;
+  children: ?Array<VNode>;
   text: string | void;
   elm: Node | void;
   ns: string | void;
@@ -23,10 +23,9 @@ export default class VNode {
   constructor (
     tag?: string,
     data?: VNodeData,
-    children?: Array<VNode> | void,
+    children?: ?Array<VNode>,
     text?: string,
     elm?: Node,
-    ns?: string | void,
     context?: Component,
     componentOptions?: VNodeComponentOptions
   ) {
@@ -35,7 +34,7 @@ export default class VNode {
     this.children = children
     this.text = text
     this.elm = elm
-    this.ns = ns
+    this.ns = undefined
     this.context = context
     this.functionalContext = undefined
     this.key = data && data.key
@@ -51,13 +50,17 @@ export default class VNode {
   }
 }
 
-export const emptyVNode = () => {
+export const createEmptyVNode = () => {
   const node = new VNode()
   node.text = ''
   node.isComment = true
   return node
 }
 
+export function createTextVNode (val: string | number) {
+  return new VNode(undefined, undefined, undefined, String(val))
+}
+
 // optimized shallow clone
 // used for static nodes and slot nodes because they may be reused across
 // multiple renders, cloning them avoids errors when DOM manipulations rely
@@ -69,10 +72,10 @@ export function cloneVNode (vnode: VNode): VNode {
     vnode.children,
     vnode.text,
     vnode.elm,
-    vnode.ns,
     vnode.context,
     vnode.componentOptions
   )
+  cloned.ns = vnode.ns
   cloned.isStatic = vnode.isStatic
   cloned.key = vnode.key
   cloned.isCloned = true
diff --git a/src/entries/web-runtime.js b/src/entries/web-runtime.js
index 846a5921ad1..2921db4187d 100644
--- a/src/entries/web-runtime.js
+++ b/src/entries/web-runtime.js
@@ -3,7 +3,7 @@
 import Vue from 'core/index'
 import config from 'core/config'
 import { extend, noop } from 'shared/util'
-import { devtools, inBrowser } from 'core/util/index'
+import { devtools, inBrowser, isEdge } from 'core/util/index'
 import { patch } from 'web/runtime/patch'
 import platformDirectives from 'web/runtime/directives/index'
 import platformComponents from 'web/runtime/components/index'
@@ -45,7 +45,7 @@ setTimeout(() => {
       devtools.emit('init', Vue)
     } else if (
       process.env.NODE_ENV !== 'production' &&
-      inBrowser && /Chrome\/\d+/.test(window.navigator.userAgent)
+      inBrowser && !isEdge && /Chrome\/\d+/.test(window.navigator.userAgent)
     ) {
       console.log(
         'Download the Vue Devtools for a better development experience:\n' +
diff --git a/src/entries/weex-framework.js b/src/entries/weex-framework.js
index a462a16024f..83ac279afef 100755
--- a/src/entries/weex-framework.js
+++ b/src/entries/weex-framework.js
@@ -1,7 +1,7 @@
 import Vue from 'weex/runtime/index'
 import renderer from 'weex/runtime/config'
 
-Vue.weexVersion = '2.0.5-weex.1'
+Vue.weexVersion = '__WEEX_VERSION__'
 export { Vue }
 
 const {
diff --git a/src/platforms/web/compiler/directives/model.js b/src/platforms/web/compiler/directives/model.js
index 59b72cb619a..e55d1ad009e 100644
--- a/src/platforms/web/compiler/directives/model.js
+++ b/src/platforms/web/compiler/directives/model.js
@@ -127,10 +127,12 @@ function genDefaultModel (
   valueExpression = number || type === 'number'
     ? `_n(${valueExpression})`
     : valueExpression
+
   let code = genAssignmentCode(value, valueExpression)
   if (isNative && needCompositionGuard) {
     code = `if($event.target.composing)return;${code}`
   }
+
   // inputs with type="file" are read only and setting the input's
   // value will throw an error.
   if (process.env.NODE_ENV !== 'production' &&
@@ -140,8 +142,12 @@ function genDefaultModel (
       `File inputs are read only. Use a v-on:change listener instead.`
     )
   }
+
   addProp(el, 'value', isNative ? `_s(${value})` : `(${value})`)
   addHandler(el, event, code, null, true)
+  if (trim || number || type === 'number') {
+    addHandler(el, 'blur', '$forceUpdate()')
+  }
 }
 
 function genSelect (
diff --git a/src/platforms/web/runtime/directives/model.js b/src/platforms/web/runtime/directives/model.js
index 1cf3c006cff..1ac5fb73f0b 100644
--- a/src/platforms/web/runtime/directives/model.js
+++ b/src/platforms/web/runtime/directives/model.js
@@ -40,17 +40,17 @@ export default {
       if (isIE || isEdge) {
         setTimeout(cb, 0)
       }
-    } else if (
-      (vnode.tag === 'textarea' || el.type === 'text') &&
-      !binding.modifiers.lazy
-    ) {
-      if (!isAndroid) {
-        el.addEventListener('compositionstart', onCompositionStart)
-        el.addEventListener('compositionend', onCompositionEnd)
-      }
-      /* istanbul ignore if */
-      if (isIE9) {
-        el.vmodel = true
+    } else if (vnode.tag === 'textarea' || el.type === 'text') {
+      el._vModifiers = binding.modifiers
+      if (!binding.modifiers.lazy) {
+        if (!isAndroid) {
+          el.addEventListener('compositionstart', onCompositionStart)
+          el.addEventListener('compositionend', onCompositionEnd)
+        }
+        /* istanbul ignore if */
+        if (isIE9) {
+          el.vmodel = true
+        }
       }
     }
   },
diff --git a/src/platforms/web/runtime/directives/show.js b/src/platforms/web/runtime/directives/show.js
index df3c32e20e6..fa0734f82ba 100644
--- a/src/platforms/web/runtime/directives/show.js
+++ b/src/platforms/web/runtime/directives/show.js
@@ -14,12 +14,16 @@ export default {
   bind (el: any, { value }: VNodeDirective, vnode: VNodeWithData) {
     vnode = locateNode(vnode)
     const transition = vnode.data && vnode.data.transition
+    const originalDisplay = el.__vOriginalDisplay =
+      el.style.display === 'none' ? '' : el.style.display
     if (value && transition && !isIE9) {
-      enter(vnode)
+      vnode.data.show = true
+      enter(vnode, () => {
+        el.style.display = originalDisplay
+      })
+    } else {
+      el.style.display = value ? originalDisplay : 'none'
     }
-    const originalDisplay = el.style.display === 'none' ? '' : el.style.display
-    el.style.display = value ? originalDisplay : 'none'
-    el.__vOriginalDisplay = originalDisplay
   },
   update (el: any, { value, oldValue }: VNodeDirective, vnode: VNodeWithData) {
     /* istanbul ignore if */
@@ -27,9 +31,11 @@ export default {
     vnode = locateNode(vnode)
     const transition = vnode.data && vnode.data.transition
     if (transition && !isIE9) {
+      vnode.data.show = true
       if (value) {
-        enter(vnode)
-        el.style.display = el.__vOriginalDisplay
+        enter(vnode, () => {
+          el.style.display = el.__vOriginalDisplay
+        })
       } else {
         leave(vnode, () => {
           el.style.display = 'none'
diff --git a/src/platforms/web/runtime/modules/attrs.js b/src/platforms/web/runtime/modules/attrs.js
index 12d3aa02b39..06ff8b4b34d 100644
--- a/src/platforms/web/runtime/modules/attrs.js
+++ b/src/platforms/web/runtime/modules/attrs.js
@@ -1,6 +1,7 @@
 /* @flow */
 
 import { extend } from 'shared/util'
+import { isIE9 } from 'core/util/env'
 import {
   isBooleanAttr,
   isEnumeratedAttr,
@@ -17,7 +18,7 @@ function updateAttrs (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   let key, cur, old
   const elm = vnode.elm
   const oldAttrs = oldVnode.data.attrs || {}
-  let attrs = vnode.data.attrs || {}
+  let attrs: any = vnode.data.attrs || {}
   // clone observed objects, as the user probably wants to mutate it
   if (attrs.__ob__) {
     attrs = vnode.data.attrs = extend({}, attrs)
@@ -30,6 +31,11 @@ function updateAttrs (oldVnode: VNodeWithData, vnode: VNodeWithData) {
       setAttr(elm, key, cur)
     }
   }
+  // #4391: in IE9, setting type can reset value for input[type=radio]
+  /* istanbul ignore if */
+  if (isIE9 && attrs.value !== oldAttrs.value) {
+    setAttr(elm, 'value', attrs.value)
+  }
   for (key in oldAttrs) {
     if (attrs[key] == null) {
       if (isXlink(key)) {
diff --git a/src/platforms/web/runtime/modules/dom-props.js b/src/platforms/web/runtime/modules/dom-props.js
index 545fbf65401..ce00db94b74 100644
--- a/src/platforms/web/runtime/modules/dom-props.js
+++ b/src/platforms/web/runtime/modules/dom-props.js
@@ -1,6 +1,6 @@
 /* @flow */
 
-import { extend } from 'shared/util'
+import { extend, toNumber } from 'shared/util'
 
 function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   if (!oldVnode.data.domProps && !vnode.data.domProps) {
@@ -35,7 +35,10 @@ function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
       elm._value = cur
       // avoid resetting cursor position when value is the same
       const strCur = cur == null ? '' : String(cur)
-      if (elm.value !== strCur && !elm.composing) {
+      if (!elm.composing && (
+        (document.activeElement !== elm && elm.value !== strCur) ||
+        isValueChanged(vnode, strCur)
+      )) {
         elm.value = strCur
       }
     } else {
@@ -44,6 +47,18 @@ function updateDOMProps (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   }
 }
 
+function isValueChanged (vnode: VNodeWithData, newVal: string): boolean {
+  const value = vnode.elm.value
+  const modifiers = vnode.elm._vModifiers // injected by v-model runtime
+  if ((modifiers && modifiers.number) || vnode.elm.type === 'number') {
+    return toNumber(value) !== toNumber(newVal)
+  }
+  if (modifiers && modifiers.trim) {
+    return value.trim() !== newVal.trim()
+  }
+  return value !== newVal
+}
+
 export default {
   create: updateDOMProps,
   update: updateDOMProps
diff --git a/src/platforms/web/runtime/modules/events.js b/src/platforms/web/runtime/modules/events.js
index aedb2669750..316fc8ca895 100644
--- a/src/platforms/web/runtime/modules/events.js
+++ b/src/platforms/web/runtime/modules/events.js
@@ -1,33 +1,33 @@
-// skip type checking this file because we need to attach private properties
-// to elements
+/* @flow */
 
 import { updateListeners } from 'core/vdom/helpers/index'
 
-function updateDOMListeners (oldVnode, vnode) {
+let target: HTMLElement
+
+function add (event: string, handler: Function, once: boolean, capture: boolean) {
+  if (once) {
+    const oldHandler = handler
+    handler = function (ev) {
+      remove(event, handler, capture)
+      arguments.length === 1
+        ? oldHandler(ev)
+        : oldHandler.apply(null, arguments)
+    }
+  }
+  target.addEventListener(event, handler, capture)
+}
+
+function remove (event: string, handler: Function, capture: boolean) {
+  target.removeEventListener(event, handler, capture)
+}
+
+function updateDOMListeners (oldVnode: VNodeWithData, vnode: VNodeWithData) {
   if (!oldVnode.data.on && !vnode.data.on) {
     return
   }
   const on = vnode.data.on || {}
   const oldOn = oldVnode.data.on || {}
-  const add = vnode.elm._v_add || (
-    vnode.elm._v_add = (event, handler, once, capture) => {
-      if (once) {
-        const oldHandler = handler
-        handler = function (ev) {
-          remove(event, handler, capture)
-          arguments.length === 1
-            ? oldHandler(ev)
-            : oldHandler.apply(null, arguments)
-        }
-      }
-      vnode.elm.addEventListener(event, handler, capture)
-    }
-  )
-  const remove = vnode.elm._v_remove || (
-    vnode.elm._v_remove = (event, handler, capture) => {
-      vnode.elm.removeEventListener(event, handler, capture)
-    }
-  )
+  target = vnode.elm
   updateListeners(on, oldOn, add, remove, vnode.context)
 }
 
diff --git a/src/platforms/web/runtime/modules/transition.js b/src/platforms/web/runtime/modules/transition.js
index 87a8fa87382..a9176c1b26c 100644
--- a/src/platforms/web/runtime/modules/transition.js
+++ b/src/platforms/web/runtime/modules/transition.js
@@ -11,7 +11,7 @@ import {
   whenTransitionEnds
 } from '../transition-util'
 
-export function enter (vnode: VNodeWithData) {
+export function enter (vnode: VNodeWithData, toggleDisplay: ?() => void) {
   const el: any = vnode.elm
 
   // call leave callback now
@@ -122,6 +122,7 @@ export function enter (vnode: VNodeWithData) {
   }
 
   if (vnode.data.show) {
+    toggleDisplay && toggleDisplay()
     enterHook && enterHook(el, cb)
   }
 
diff --git a/src/platforms/web/runtime/node-ops.js b/src/platforms/web/runtime/node-ops.js
index 0891a24f8cd..8f8c7026932 100644
--- a/src/platforms/web/runtime/node-ops.js
+++ b/src/platforms/web/runtime/node-ops.js
@@ -53,10 +53,6 @@ export function setTextContent (node: Node, text: string) {
   node.textContent = text
 }
 
-export function childNodes (node: Node): NodeList<Node> {
-  return node.childNodes
-}
-
 export function setAttribute (node: Element, key: string, val: string) {
   node.setAttribute(key, val)
 }
diff --git a/src/platforms/web/util/attrs.js b/src/platforms/web/util/attrs.js
index 56bc66f3b1d..cb6b6e0cc54 100644
--- a/src/platforms/web/util/attrs.js
+++ b/src/platforms/web/util/attrs.js
@@ -3,9 +3,10 @@
 import { makeMap } from 'shared/util'
 
 // attributes that should be using props for binding
+const acceptValue = makeMap('input,textarea,option,select')
 export const mustUseProp = (tag: string, attr: string): boolean => {
   return (
-    (attr === 'value' && (tag === 'input' || tag === 'textarea' || tag === 'option')) ||
+    (attr === 'value' && acceptValue(tag)) ||
     (attr === 'selected' && tag === 'option') ||
     (attr === 'checked' && tag === 'input') ||
     (attr === 'muted' && tag === 'video')
diff --git a/src/platforms/weex/runtime/node-ops.js b/src/platforms/weex/runtime/node-ops.js
index 8fcc4f19615..11acd8ea4ef 100755
--- a/src/platforms/weex/runtime/node-ops.js
+++ b/src/platforms/weex/runtime/node-ops.js
@@ -19,9 +19,6 @@ export function createComment (text) {
 }
 
 export function insertBefore (node, target, before) {
-  if (!before) {
-    return appendChild(node, target)
-  }
   if (target.nodeType === 3) {
     if (node.type === 'text') {
       node.setAttr('value', target.text)
@@ -72,10 +69,6 @@ export function setTextContent (node, text) {
   node.parentNode.setAttr('value', text)
 }
 
-export function childNodes (node) {
-  return node.pureChildren
-}
-
 export function setAttribute (node, key, val) {
   node.setAttr(key, val)
 }
diff --git a/src/server/render.js b/src/server/render.js
index 9fa0dcad0a8..b8968e595d7 100644
--- a/src/server/render.js
+++ b/src/server/render.js
@@ -279,11 +279,11 @@ export function createRenderFunction (
 }
 
 function checkBuild (component) {
-  let Vue = component.constructor
+  let Vue: any = component.constructor
   while (Vue.super) {
     Vue = Vue.super
   }
-  if (Vue.compile) {
+  if (Vue.compile && Vue.config.devtools !== false) {
     console.error(
       red(`\n[vue-server-renderer] You are using the standalone build (vue/dist/vue.js) for ` +
       `server-side rendering. It is recommended to use the CommonJS build ` +
diff --git a/src/shared/util.js b/src/shared/util.js
index 00ed5d54a23..0054df62c8a 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -189,6 +189,11 @@ export function noop () {}
  */
 export const no = () => false
 
+/**
+ * Return same value
+ */
+export const identity = (_: any) => _
+
 /**
  * Generate a static keys string from compiler modules.
  */
diff --git a/test/unit/features/component/component-async.spec.js b/test/unit/features/component/component-async.spec.js
index 3ba75af4c1e..bdcd0812570 100644
--- a/test/unit/features/component/component-async.spec.js
+++ b/test/unit/features/component/component-async.spec.js
@@ -17,7 +17,7 @@ describe('Component async', () => {
         }
       }
     }).$mount()
-    expect(vm.$el.innerHTML).toBe('')
+    expect(vm.$el.innerHTML).toBe('<!---->')
     expect(vm.$children.length).toBe(0)
     function next () {
       expect(vm.$el.innerHTML).toBe('<div>hi</div>')
@@ -151,7 +151,7 @@ describe('Component async', () => {
         }
       }
     }).$mount()
-    expect(vm.$el.innerHTML).toBe('')
+    expect(vm.$el.innerHTML).toBe('<!---->')
     expect(vm.$children.length).toBe(0)
     function next () {
       expect(vm.$el.innerHTML).toBe('<div>hi</div>')
diff --git a/test/unit/features/directives/bind.spec.js b/test/unit/features/directives/bind.spec.js
index f9d17a584a9..5635778569c 100644
--- a/test/unit/features/directives/bind.spec.js
+++ b/test/unit/features/directives/bind.spec.js
@@ -121,6 +121,18 @@ describe('Directive v-bind', () => {
     expect(vm.$el.children[1].innerHTML).toBe('<span>qux</span>')
   })
 
+  it('.prop modifier with normal attribute binding', () => {
+    const vm = new Vue({
+      template: '<input :some.prop="some" :id="id">',
+      data: {
+        some: 'hello',
+        id: false
+      }
+    }).$mount()
+    expect(vm.$el.some).toBe('hello')
+    expect(vm.$el.getAttribute('id')).toBe(null)
+  })
+
   it('.camel modifier', () => {
     const vm = new Vue({
       template: '<svg :view-box.camel="viewBox"></svg>',
diff --git a/test/unit/features/directives/model-text.spec.js b/test/unit/features/directives/model-text.spec.js
index f4ce9e451a7..8c4112832de 100644
--- a/test/unit/features/directives/model-text.spec.js
+++ b/test/unit/features/directives/model-text.spec.js
@@ -64,6 +64,61 @@ describe('Directive v-model text', () => {
     expect(vm.test).toBe('what')
   })
 
+  it('.number focus and typing', (done) => {
+    const vm = new Vue({
+      data: {
+        test: 0,
+        update: 0
+      },
+      template:
+        '<div>' +
+          '<input ref="input" v-model.number="test">{{ update }}' +
+          '<input ref="blur">' +
+        '</div>'
+    }).$mount()
+    document.body.appendChild(vm.$el)
+    vm.$refs.input.focus()
+    expect(vm.test).toBe(0)
+    vm.$refs.input.value = '1.0'
+    triggerEvent(vm.$refs.input, 'input')
+    expect(vm.test).toBe(1)
+    vm.update++
+    waitForUpdate(() => {
+      expect(vm.$refs.input.value).toBe('1.0')
+      vm.$refs.blur.focus()
+      vm.update++
+    }).then(() => {
+      expect(vm.$refs.input.value).toBe('1')
+    }).then(done)
+  })
+
+  it('.trim focus and typing', (done) => {
+    const vm = new Vue({
+      data: {
+        test: 'abc',
+        update: 0
+      },
+      template:
+        '<div>' +
+          '<input ref="input" v-model.trim="test" type="text">{{ update }}' +
+          '<input ref="blur"/>' +
+        '</div>'
+    }).$mount()
+    document.body.appendChild(vm.$el)
+    vm.$refs.input.focus()
+    vm.$refs.input.value = ' abc '
+    triggerEvent(vm.$refs.input, 'input')
+    expect(vm.test).toBe('abc')
+    vm.update++
+    waitForUpdate(() => {
+      expect(vm.$refs.input.value).toBe(' abc ')
+      vm.$refs.blur.focus()
+      vm.update++
+    }).then(() => {
+      expect(vm.$refs.input.value).toBe('abc')
+    }).then(done)
+  })
+
   it('multiple inputs', (done) => {
     const spy = jasmine.createSpy()
     const vm = new Vue({
diff --git a/test/unit/features/filter/filter.spec.js b/test/unit/features/filter/filter.spec.js
index 98e0630e2d9..2a506dce960 100644
--- a/test/unit/features/filter/filter.spec.js
+++ b/test/unit/features/filter/filter.spec.js
@@ -69,6 +69,15 @@ describe('Filters', () => {
     expect(vm.$refs.test.pattern.toString()).toBe('/a|b\\//')
   })
 
+  it('handle division', () => {
+    const vm = new Vue({
+      data: { a: 2 },
+      template: `<div>{{ 1/a / 4 | double }}</div>`,
+      filters: { double: v => v * 2 }
+    }).$mount()
+    expect(vm.$el.textContent).toBe(String(1 / 4))
+  })
+
   it('arguments', () => {
     const vm = new Vue({
       template: `<div>{{ msg | add(a, 3) }}</div>`,
diff --git a/test/unit/features/global-api/assets.spec.js b/test/unit/features/global-api/assets.spec.js
index e0095025c8d..41e6b5fa6b7 100644
--- a/test/unit/features/global-api/assets.spec.js
+++ b/test/unit/features/global-api/assets.spec.js
@@ -48,4 +48,21 @@ describe('Global API: assets', () => {
     // extended registration should not pollute global
     expect(Vue.options.components.test).toBeUndefined()
   })
+
+  // #4434
+  it('local registration should take priority regardless of naming convention', () => {
+    Vue.component('x-foo', {
+      template: '<span>global</span>'
+    })
+    const vm = new Vue({
+      components: {
+        xFoo: {
+          template: '<span>local</span>'
+        }
+      },
+      template: '<div><x-foo></x-foo></div>'
+    }).$mount()
+    expect(vm.$el.textContent).toBe('local')
+    delete Vue.options.components['x-foo']
+  })
 })
diff --git a/test/unit/features/options/name.spec.js b/test/unit/features/options/name.spec.js
index 74cccd0024f..2f586f85893 100644
--- a/test/unit/features/options/name.spec.js
+++ b/test/unit/features/options/name.spec.js
@@ -15,7 +15,16 @@ describe('Options name', () => {
     })
 
     /* eslint-disable */
-    expect(`Invalid component name: "Hyper*Vue". Component names can only contain alphanumeric characaters and the hyphen.`)
+    expect(`Invalid component name: "Hyper*Vue". Component names can only contain alphanumeric characters and the hyphen, and must start with a letter.`)
+      .toHaveBeenWarned()
+    /* eslint-enable */
+
+    Vue.extend({
+      name: '2Cool2BValid'
+    })
+
+    /* eslint-disable */
+    expect(`Invalid component name: "2Cool2BValid". Component names can only contain alphanumeric characters and the hyphen, and must start with a letter.`)
       .toHaveBeenWarned()
     /* eslint-enable */
   })
diff --git a/test/unit/features/transition/transition.spec.js b/test/unit/features/transition/transition.spec.js
index 3252153b0a4..d1ceeeafe8d 100644
--- a/test/unit/features/transition/transition.spec.js
+++ b/test/unit/features/transition/transition.spec.js
@@ -279,20 +279,32 @@ if (!isIE9) {
         data: { ok: true },
         methods: {
           beforeLeave: (el) => {
+            expect(el.style.display).toBe('')
             expect(el).toBe(vm.$el.children[0])
             expect(el.className).toBe('test')
             beforeLeaveSpy(el)
           },
-          leave: (el) => onLeaveSpy(el),
-          afterLeave: (el) => afterLeaveSpy(el),
+          leave: (el) => {
+            expect(el.style.display).toBe('')
+            onLeaveSpy(el)
+          },
+          afterLeave: (el) => {
+            expect(el.style.display).toBe('none')
+            afterLeaveSpy(el)
+          },
           beforeEnter: (el) => {
             expect(el.className).toBe('test')
+            expect(el.style.display).toBe('none')
             beforeEnterSpy(el)
           },
           enter: (el) => {
+            expect(el.style.display).toBe('')
             onEnterSpy(el)
           },
-          afterEnter: (el) => afterEnterSpy(el)
+          afterEnter: (el) => {
+            expect(el.style.display).toBe('')
+            afterEnterSpy(el)
+          }
         }
       }).$mount(el)
 
diff --git a/test/unit/modules/compiler/codegen.spec.js b/test/unit/modules/compiler/codegen.spec.js
index 25fae4ea16a..ecee02e8a50 100644
--- a/test/unit/modules/compiler/codegen.spec.js
+++ b/test/unit/modules/compiler/codegen.spec.js
@@ -33,130 +33,135 @@ describe('codegen', () => {
   it('generate directive', () => {
     assertCodegen(
       '<p v-custom1:arg1.modifier="value1" v-custom2></p>',
-      `with(this){return _h('p',{directives:[{name:"custom1",rawName:"v-custom1:arg1.modifier",value:(value1),expression:"value1",arg:"arg1",modifiers:{"modifier":true}},{name:"custom2",rawName:"v-custom2",arg:"arg1"}]})}`
+      `with(this){return _c('p',{directives:[{name:"custom1",rawName:"v-custom1:arg1.modifier",value:(value1),expression:"value1",arg:"arg1",modifiers:{"modifier":true}},{name:"custom2",rawName:"v-custom2",arg:"arg1"}]})}`
     )
   })
 
   it('generate filters', () => {
     assertCodegen(
       '<div :id="a | b | c">{{ d | e | f }}</div>',
-      `with(this){return _h('div',{attrs:{"id":_f("c")(_f("b")(a))}},[_s(_f("f")(_f("e")(d)))])}`
+      `with(this){return _c('div',{attrs:{"id":_f("c")(_f("b")(a))}},[_v(_s(_f("f")(_f("e")(d))))])}`
     )
   })
 
   it('generate v-for directive', () => {
     assertCodegen(
       '<div><li v-for="item in items" :key="item.uid"></li></div>',
-      `with(this){return _h('div',[_l((items),function(item){return _h('li',{key:item.uid})})])}`
+      `with(this){return _c('div',_l((items),function(item){return _c('li',{key:item.uid})}))}`
     )
     // iterator syntax
     assertCodegen(
       '<div><li v-for="(item, i) in items"></li></div>',
-      `with(this){return _h('div',[_l((items),function(item,i){return _h('li')})])}`
+      `with(this){return _c('div',_l((items),function(item,i){return _c('li')}))}`
     )
     assertCodegen(
       '<div><li v-for="(item, key, index) in items"></li></div>',
-      `with(this){return _h('div',[_l((items),function(item,key,index){return _h('li')})])}`
+      `with(this){return _c('div',_l((items),function(item,key,index){return _c('li')}))}`
     )
     // destructuring
     assertCodegen(
       '<div><li v-for="{ a, b } in items"></li></div>',
-      `with(this){return _h('div',[_l((items),function({ a, b }){return _h('li')})])}`
+      `with(this){return _c('div',_l((items),function({ a, b }){return _c('li')}))}`
     )
     assertCodegen(
       '<div><li v-for="({ a, b }, key, index) in items"></li></div>',
-      `with(this){return _h('div',[_l((items),function({ a, b },key,index){return _h('li')})])}`
+      `with(this){return _c('div',_l((items),function({ a, b },key,index){return _c('li')}))}`
+    )
+    // v-for with extra element
+    assertCodegen(
+      '<div><p></p><li v-for="item in items"></li></div>',
+      `with(this){return _c('div',[_c('p'),_l((items),function(item){return _c('li')})],true)}`
     )
   })
 
   it('generate v-if directive', () => {
     assertCodegen(
       '<p v-if="show">hello</p>',
-      `with(this){return (show)?_h('p',["hello"]):_e()}`
+      `with(this){return (show)?_c('p',[_v("hello")]):_e()}`
     )
   })
 
   it('generate v-else directive', () => {
     assertCodegen(
       '<div><p v-if="show">hello</p><p v-else>world</p></div>',
-      `with(this){return _h('div',[(show)?_h('p',["hello"]):_h('p',["world"])])}`
+      `with(this){return _c('div',[(show)?_c('p',[_v("hello")]):_c('p',[_v("world")])])}`
     )
   })
 
   it('generate v-else-if directive', () => {
     assertCodegen(
       '<div><p v-if="show">hello</p><p v-else-if="hide">world</p></div>',
-      `with(this){return _h('div',[(show)?_h('p',["hello"]):(hide)?_h('p',["world"]):_e()])}`
+      `with(this){return _c('div',[(show)?_c('p',[_v("hello")]):(hide)?_c('p',[_v("world")]):_e()])}`
     )
   })
 
   it('generate v-else-if with v-else directive', () => {
     assertCodegen(
       '<div><p v-if="show">hello</p><p v-else-if="hide">world</p><p v-else>bye</p></div>',
-      `with(this){return _h('div',[(show)?_h('p',["hello"]):(hide)?_h('p',["world"]):_h('p',["bye"])])}`
+      `with(this){return _c('div',[(show)?_c('p',[_v("hello")]):(hide)?_c('p',[_v("world")]):_c('p',[_v("bye")])])}`
     )
   })
 
   it('generate mutli v-else-if with v-else directive', () => {
     assertCodegen(
         '<div><p v-if="show">hello</p><p v-else-if="hide">world</p><p v-else-if="3">elseif</p><p v-else>bye</p></div>',
-        `with(this){return _h('div',[(show)?_h('p',["hello"]):(hide)?_h('p',["world"]):(3)?_h('p',["elseif"]):_h('p',["bye"])])}`
+        `with(this){return _c('div',[(show)?_c('p',[_v("hello")]):(hide)?_c('p',[_v("world")]):(3)?_c('p',[_v("elseif")]):_c('p',[_v("bye")])])}`
     )
   })
 
   it('generate ref', () => {
     assertCodegen(
       '<p ref="component1"></p>',
-      `with(this){return _h('p',{ref:"component1"})}`
+      `with(this){return _c('p',{ref:"component1"})}`
     )
   })
 
   it('generate ref on v-for', () => {
     assertCodegen(
       '<ul><li v-for="item in items" ref="component1"></li></ul>',
-      `with(this){return _h('ul',[_l((items),function(item){return _h('li',{ref:"component1",refInFor:true})})])}`
+      `with(this){return _c('ul',_l((items),function(item){return _c('li',{ref:"component1",refInFor:true})}))}`
     )
   })
 
   it('generate v-bind directive', () => {
     assertCodegen(
       '<p v-bind="test"></p>',
-      `with(this){return _h('p',_b({},'p',test))}`
+      `with(this){return _c('p',_b({},'p',test))}`
     )
   })
 
   it('generate template tag', () => {
     assertCodegen(
       '<div><template><p>{{hello}}</p></template></div>',
-      `with(this){return _h('div',[[_h('p',[_s(hello)])]])}`
+      `with(this){return _c('div',[[_c('p',[_v(_s(hello))])]],true)}`
     )
   })
 
   it('generate single slot', () => {
     assertCodegen(
       '<div><slot></slot></div>',
-      `with(this){return _h('div',[_t("default")])}`
+      `with(this){return _c('div',[_t("default")],true)}`
     )
   })
 
   it('generate named slot', () => {
     assertCodegen(
       '<div><slot name="one"></slot></div>',
-      `with(this){return _h('div',[_t("one")])}`
+      `with(this){return _c('div',[_t("one")],true)}`
     )
   })
 
   it('generate slot fallback content', () => {
     assertCodegen(
       '<div><slot><div>hi</div></slot></div>',
-      `with(this){return _h('div',[_t("default",[_h('div',["hi"])])])}`
+      `with(this){return _c('div',[_t("default",[_c('div',[_v("hi")])])],true)}`
     )
   })
 
   it('generate slot target', () => {
     assertCodegen(
       '<p slot="one">hello world</p>',
-      `with(this){return _h('p',{slot:"one"},["hello world"])}`
+      `with(this){return _c('p',{slot:"one"},[_v("hello world")])}`
     )
   })
 
@@ -164,26 +169,26 @@ describe('codegen', () => {
     // static
     assertCodegen(
       '<p class="class1">hello world</p>',
-      `with(this){return _h('p',{staticClass:"class1"},["hello world"])}`,
+      `with(this){return _c('p',{staticClass:"class1"},[_v("hello world")])}`,
     )
     // dynamic
     assertCodegen(
       '<p :class="class1">hello world</p>',
-      `with(this){return _h('p',{class:class1},["hello world"])}`
+      `with(this){return _c('p',{class:class1},[_v("hello world")])}`
     )
   })
 
   it('generate style binding', () => {
     assertCodegen(
       '<p :style="error">hello world</p>',
-      `with(this){return _h('p',{style:(error)},["hello world"])}`
+      `with(this){return _c('p',{style:(error)},[_v("hello world")])}`
     )
   })
 
   it('generate v-show directive', () => {
     assertCodegen(
       '<p v-show="shown">hello world</p>',
-      `with(this){return _h('p',{directives:[{name:"show",rawName:"v-show",value:(shown),expression:"shown"}]},["hello world"])}`
+      `with(this){return _c('p',{directives:[{name:"show",rawName:"v-show",value:(shown),expression:"shown"}]},[_v("hello world")])}`
     )
   })
 
@@ -191,136 +196,136 @@ describe('codegen', () => {
     // input + value
     assertCodegen(
       '<input :value="msg">',
-      `with(this){return _h('input',{domProps:{"value":msg}})}`
+      `with(this){return _c('input',{domProps:{"value":msg}})}`
     )
     // non input
     assertCodegen(
       '<p :value="msg">',
-      `with(this){return _h('p',{attrs:{"value":msg}})}`
+      `with(this){return _c('p',{attrs:{"value":msg}})}`
     )
   })
 
   it('generate attrs with v-bind directive', () => {
     assertCodegen(
       '<input :name="field1">',
-      `with(this){return _h('input',{attrs:{"name":field1}})}`
+      `with(this){return _c('input',{attrs:{"name":field1}})}`
     )
   })
 
   it('generate static attrs', () => {
     assertCodegen(
       '<input name="field1">',
-      `with(this){return _h('input',{attrs:{"name":"field1"}})}`
+      `with(this){return _c('input',{attrs:{"name":"field1"}})}`
     )
   })
 
   it('generate events with v-on directive', () => {
     assertCodegen(
       '<input @input="onInput">',
-      `with(this){return _h('input',{on:{"input":onInput}})}`
+      `with(this){return _c('input',{on:{"input":onInput}})}`
     )
   })
 
   it('generate events with keycode', () => {
     assertCodegen(
       '<input @input.enter="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){if(_k($event.keyCode,"enter",13))return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(_k($event.keyCode,"enter",13))return;onInput($event)}}})}`
     )
     // multiple keycodes (delete)
     assertCodegen(
       '<input @input.delete="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){if(_k($event.keyCode,"delete",[8,46]))return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(_k($event.keyCode,"delete",[8,46]))return;onInput($event)}}})}`
     )
     // multiple keycodes (chained)
     assertCodegen(
       '<input @keydown.enter.delete="onInput">',
-      `with(this){return _h('input',{on:{"keydown":function($event){if(_k($event.keyCode,"enter",13)&&_k($event.keyCode,"delete",[8,46]))return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"keydown":function($event){if(_k($event.keyCode,"enter",13)&&_k($event.keyCode,"delete",[8,46]))return;onInput($event)}}})}`
     )
     // number keycode
     assertCodegen(
       '<input @input.13="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){if($event.keyCode!==13)return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if($event.keyCode!==13)return;onInput($event)}}})}`
     )
     // custom keycode
     assertCodegen(
       '<input @input.custom="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){if(_k($event.keyCode,"custom"))return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if(_k($event.keyCode,"custom"))return;onInput($event)}}})}`
     )
   })
 
   it('generate events with generic modifiers', () => {
     assertCodegen(
       '<input @input.stop="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){$event.stopPropagation();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();onInput($event)}}})}`
     )
     assertCodegen(
       '<input @input.prevent="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){$event.preventDefault();onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.preventDefault();onInput($event)}}})}`
     )
     assertCodegen(
       '<input @input.self="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){if($event.target !== $event.currentTarget)return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){if($event.target !== $event.currentTarget)return;onInput($event)}}})}`
     )
   })
 
   it('generate events with mouse event modifiers', () => {
     assertCodegen(
       '<input @click.ctrl="onClick">',
-      `with(this){return _h('input',{on:{"click":function($event){if(!$event.ctrlKey)return;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.ctrlKey)return;onClick($event)}}})}`
     )
     assertCodegen(
       '<input @click.shift="onClick">',
-      `with(this){return _h('input',{on:{"click":function($event){if(!$event.shiftKey)return;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.shiftKey)return;onClick($event)}}})}`
     )
     assertCodegen(
       '<input @click.alt="onClick">',
-      `with(this){return _h('input',{on:{"click":function($event){if(!$event.altKey)return;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.altKey)return;onClick($event)}}})}`
     )
     assertCodegen(
       '<input @click.meta="onClick">',
-      `with(this){return _h('input',{on:{"click":function($event){if(!$event.metaKey)return;onClick($event)}}})}`
+      `with(this){return _c('input',{on:{"click":function($event){if(!$event.metaKey)return;onClick($event)}}})}`
     )
   })
 
   it('generate events with multiple modifers', () => {
     assertCodegen(
       '<input @input.stop.prevent.self="onInput">',
-      `with(this){return _h('input',{on:{"input":function($event){$event.stopPropagation();$event.preventDefault();if($event.target !== $event.currentTarget)return;onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){$event.stopPropagation();$event.preventDefault();if($event.target !== $event.currentTarget)return;onInput($event)}}})}`
     )
   })
 
   it('generate events with capture modifier', () => {
     assertCodegen(
       '<input @input.capture="onInput">',
-      `with(this){return _h('input',{on:{"!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"!input":function($event){onInput($event)}}})}`
     )
   })
 
   it('generate events with once modifier', () => {
     assertCodegen(
       '<input @input.once="onInput">',
-      `with(this){return _h('input',{on:{"~input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~input":function($event){onInput($event)}}})}`
     )
   })
 
   it('generate events with capture and once modifier', () => {
     assertCodegen(
       '<input @input.capture.once="onInput">',
-      `with(this){return _h('input',{on:{"~!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~!input":function($event){onInput($event)}}})}`
     )
   })
 
   it('generate events with once and capture modifier', () => {
     assertCodegen(
       '<input @input.once.capture="onInput">',
-      `with(this){return _h('input',{on:{"~!input":function($event){onInput($event)}}})}`
+      `with(this){return _c('input',{on:{"~!input":function($event){onInput($event)}}})}`
     )
   })
 
   it('generate events with inline statement', () => {
     assertCodegen(
       '<input @input="curent++">',
-      `with(this){return _h('input',{on:{"input":function($event){curent++}}})}`
+      `with(this){return _c('input',{on:{"input":function($event){curent++}}})}`
     )
   })
 
@@ -328,32 +333,32 @@ describe('codegen', () => {
     // normal function
     assertCodegen(
       '<input @input="function () { current++ }">',
-      `with(this){return _h('input',{on:{"input":function () { current++ }}})}`
+      `with(this){return _c('input',{on:{"input":function () { current++ }}})}`
     )
     // arrow with no args
     assertCodegen(
       '<input @input="()=>current++">',
-      `with(this){return _h('input',{on:{"input":()=>current++}})}`
+      `with(this){return _c('input',{on:{"input":()=>current++}})}`
     )
     // arrow with parens, single arg
     assertCodegen(
       '<input @input="(e) => current++">',
-      `with(this){return _h('input',{on:{"input":(e) => current++}})}`
+      `with(this){return _c('input',{on:{"input":(e) => current++}})}`
     )
     // arrow with parens, multi args
     assertCodegen(
       '<input @input="(a, b, c) => current++">',
-      `with(this){return _h('input',{on:{"input":(a, b, c) => current++}})}`
+      `with(this){return _c('input',{on:{"input":(a, b, c) => current++}})}`
     )
     // arrow with destructuring
     assertCodegen(
       '<input @input="({ a, b }) => current++">',
-      `with(this){return _h('input',{on:{"input":({ a, b }) => current++}})}`
+      `with(this){return _c('input',{on:{"input":({ a, b }) => current++}})}`
     )
     // arrow single arg no parens
     assertCodegen(
       '<input @input="e=>current++">',
-      `with(this){return _h('input',{on:{"input":e=>current++}})}`
+      `with(this){return _c('input',{on:{"input":e=>current++}})}`
     )
   })
 
@@ -361,14 +366,14 @@ describe('codegen', () => {
   it('should not treat handler with unexpected whitespace as inline statement', () => {
     assertCodegen(
       '<input @input=" onInput ">',
-      `with(this){return _h('input',{on:{"input": onInput }})}`
+      `with(this){return _c('input',{on:{"input": onInput }})}`
     )
   })
 
   it('generate unhandled events', () => {
     assertCodegen(
       '<input @input="curent++">',
-      `with(this){return _h('input',{on:{"input":function(){}}})}`,
+      `with(this){return _c('input',{on:{"input":function(){}}})}`,
       ast => {
         ast.events.input = undefined
       }
@@ -378,32 +383,32 @@ describe('codegen', () => {
   it('generate multiple event handlers', () => {
     assertCodegen(
       '<input @input="curent++" @input.stop="onInput">',
-      `with(this){return _h('input',{on:{"input":[function($event){curent++},function($event){$event.stopPropagation();onInput($event)}]}})}`
+      `with(this){return _c('input',{on:{"input":[function($event){curent++},function($event){$event.stopPropagation();onInput($event)}]}})}`
     )
   })
 
   it('generate component', () => {
     assertCodegen(
       '<my-component name="mycomponent1" :msg="msg" @notify="onNotify"><div>hi</div></my-component>',
-      `with(this){return _h('my-component',{attrs:{"name":"mycomponent1","msg":msg},on:{"notify":onNotify}},[_h('div',["hi"])])}`
+      `with(this){return _c('my-component',{attrs:{"name":"mycomponent1","msg":msg},on:{"notify":onNotify}},[_c('div',[_v("hi")])])}`
     )
   })
 
   it('generate svg component with children', () => {
     assertCodegen(
       '<svg><my-comp><circle :r="10"></circle></my-comp></svg>',
-      `with(this){return _h('svg',[_h('my-comp',[_h('circle',{attrs:{"r":10}})])])}`
+      `with(this){return _c('svg',[_c('my-comp',[_c('circle',{attrs:{"r":10}})])])}`
     )
   })
 
   it('generate is attribute', () => {
     assertCodegen(
       '<div is="component1"></div>',
-      `with(this){return _h("component1",{tag:"div"})}`
+      `with(this){return _c("component1",{tag:"div"})}`
     )
     assertCodegen(
       '<div :is="component1"></div>',
-      `with(this){return _h(component1,{tag:"div"})}`
+      `with(this){return _c(component1,{tag:"div"})}`
     )
   })
 
@@ -411,12 +416,12 @@ describe('codegen', () => {
     // have "inline-template'"
     assertCodegen(
       '<my-component inline-template><p><span>hello world</span></p></my-component>',
-      `with(this){return _h('my-component',{inlineTemplate:{render:function(){with(this){return _m(0)}},staticRenderFns:[function(){with(this){return _h('p',[_h('span',["hello world"])])}}]}})}`
+      `with(this){return _c('my-component',{inlineTemplate:{render:function(){with(this){return _m(0)}},staticRenderFns:[function(){with(this){return _c('p',[_c('span',[_v("hello world")])])}}]}})}`
     )
     // "have inline-template attrs, but not having extactly one child element
     assertCodegen(
       '<my-component inline-template><hr><hr></my-component>',
-      `with(this){return _h('my-component',{inlineTemplate:{render:function(){with(this){return _h('hr')}},staticRenderFns:[]}})}`
+      `with(this){return _c('my-component',{inlineTemplate:{render:function(){with(this){return _c('hr')}},staticRenderFns:[]}})}`
     )
     expect('Inline-template components must have exactly one child element.').toHaveBeenWarned()
   })
@@ -424,21 +429,21 @@ describe('codegen', () => {
   it('generate static trees inside v-for', () => {
     assertCodegen(
       `<div><div v-for="i in 10"><p><span></span></p></div></div>`,
-      `with(this){return _h('div',[_l((10),function(i){return _h('div',[_m(0,true)])})])}`,
-      [`with(this){return _h('p',[_h('span')])}`]
+      `with(this){return _c('div',_l((10),function(i){return _c('div',[_m(0,true)])}))}`,
+      [`with(this){return _c('p',[_c('span')])}`]
     )
   })
 
   it('not specified ast type', () => {
     const res = generate(null, baseOptions)
-    expect(res.render).toBe(`with(this){return _h("div")}`)
+    expect(res.render).toBe(`with(this){return _c("div")}`)
     expect(res.staticRenderFns).toEqual([])
   })
 
   it('not specified directives option', () => {
     assertCodegen(
       '<p v-if="show">hello world</p>',
-      `with(this){return (show)?_h('p',["hello world"]):_e()}`,
+      `with(this){return (show)?_c('p',[_v("hello world")]):_e()}`,
       { isReservedTag }
     )
   })
diff --git a/test/unit/modules/compiler/compiler-options.spec.js b/test/unit/modules/compiler/compiler-options.spec.js
index 405458cc3df..e5017f22f84 100644
--- a/test/unit/modules/compiler/compiler-options.spec.js
+++ b/test/unit/modules/compiler/compiler-options.spec.js
@@ -51,7 +51,7 @@ describe('compile options', () => {
             result[validator.name] = null
           })
           // generate code
-          return `_h('validate',{props:{
+          return `_c('validate',{props:{
             field:${JSON.stringify(el.validate.field)},
             groups:${JSON.stringify(el.validate.groups)},
             validators:${JSON.stringify(el.validators)},
diff --git a/test/unit/modules/vdom/create-element.spec.js b/test/unit/modules/vdom/create-element.spec.js
index 52450b8a842..79a9813a2ce 100644
--- a/test/unit/modules/vdom/create-element.spec.js
+++ b/test/unit/modules/vdom/create-element.spec.js
@@ -1,14 +1,12 @@
 import Vue from 'vue'
-import { createElement } from 'core/vdom/create-element'
-import { emptyVNode } from 'core/vdom/vnode'
-import { bind } from 'shared/util'
+import { createEmptyVNode } from 'core/vdom/vnode'
 
 describe('create-element', () => {
   it('render vnode with basic reserved tag using createElement', () => {
     const vm = new Vue({
       data: { msg: 'hello world' }
     })
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('p', {})
     expect(vnode.tag).toBe('p')
     expect(vnode.data).toEqual({})
@@ -28,7 +26,7 @@ describe('create-element', () => {
         }
       }
     })
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('my-component', { props: { msg: vm.message }})
     expect(vnode.tag).toMatch(/vue-component-[0-9]+/)
     expect(vnode.componentOptions.propsData).toEqual({ msg: vm.message })
@@ -43,7 +41,7 @@ describe('create-element', () => {
     const vm = new Vue({
       data: { msg: 'hello world' }
     })
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const tag = 'custom-tag'
     const vnode = h(tag, {})
     expect(vnode.tag).toBe('custom-tag')
@@ -60,16 +58,16 @@ describe('create-element', () => {
     const vm = new Vue({
       data: { msg: 'hello world' }
     })
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h(null, {})
-    expect(vnode).toEqual(emptyVNode())
+    expect(vnode).toEqual(createEmptyVNode())
   })
 
   it('render vnode with not string tag using createElement', () => {
     const vm = new Vue({
       data: { msg: 'hello world' }
     })
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h(Vue.extend({ // Component class
       props: ['msg']
     }), { props: { msg: vm.message }})
@@ -84,7 +82,7 @@ describe('create-element', () => {
 
   it('render vnode with createElement with children', () => {
     const vm = new Vue({})
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('p', void 0, [h('br'), 'hello world', h('br')])
     expect(vnode.children[0].tag).toBe('br')
     expect(vnode.children[1].text).toBe('hello world')
@@ -93,7 +91,7 @@ describe('create-element', () => {
 
   it('render vnode with children, omitting data', () => {
     const vm = new Vue({})
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('p', [h('br'), 'hello world', h('br')])
     expect(vnode.children[0].tag).toBe('br')
     expect(vnode.children[1].text).toBe('hello world')
@@ -102,7 +100,7 @@ describe('create-element', () => {
 
   it('render svg elements with correct namespace', () => {
     const vm = new Vue({})
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('svg', [h('a', [h('foo', [h('bar')])])])
     expect(vnode.ns).toBe('svg')
     // should apply ns to children recursively
@@ -113,7 +111,7 @@ describe('create-element', () => {
 
   it('render MathML elements with correct namespace', () => {
     const vm = new Vue({})
-    const h = bind(createElement, vm)
+    const h = vm.$createElement
     const vnode = h('math', [h('matrix')])
     expect(vnode.ns).toBe('math')
     // should apply ns to children
diff --git a/test/unit/modules/vdom/modules/directive.spec.js b/test/unit/modules/vdom/modules/directive.spec.js
index f9e780c4c2f..f77d120b8b3 100644
--- a/test/unit/modules/vdom/modules/directive.spec.js
+++ b/test/unit/modules/vdom/modules/directive.spec.js
@@ -16,7 +16,7 @@ describe('vdom directive module', () => {
         directives: [{
           name: 'directive1', value: 'hello', arg: 'arg1', modifiers: { modifire1: true }
         }]
-      }, undefined, 'hello world', undefined, undefined, vm)
+      }, undefined, 'hello world', undefined, vm)
     ])
     patch(null, vnode1)
     expect(directive1.bind).toHaveBeenCalled()
@@ -26,7 +26,7 @@ describe('vdom directive module', () => {
         directives: [{
           name: 'directive1', value: 'world', arg: 'arg1', modifiers: { modifire1: true }
         }]
-      }, undefined, 'hello world', undefined, undefined, vm)
+      }, undefined, 'hello world', undefined, vm)
     ])
     patch(vnode1, vnode2)
     expect(directive1.update).toHaveBeenCalled()
diff --git a/test/unit/modules/vdom/patch/element.spec.js b/test/unit/modules/vdom/patch/element.spec.js
index 0894b0a4ebb..09bf3fa6ef8 100644
--- a/test/unit/modules/vdom/patch/element.spec.js
+++ b/test/unit/modules/vdom/patch/element.spec.js
@@ -11,7 +11,8 @@ describe('vdom patch: element', () => {
   })
 
   it('should create an element which having the namespace', () => {
-    const vnode = new VNode('svg', {}, undefined, undefined, undefined, 'svg')
+    const vnode = new VNode('svg', {})
+    vnode.ns = 'svg'
     const elm = patch(null, vnode)
     expect(elm.namespaceURI).toBe('http://www.w3.org/2000/svg')
   })
diff --git a/test/weex/compiler/compile.spec.js b/test/weex/compiler/compile.spec.js
index a3603fcc785..5a900a230da 100644
--- a/test/weex/compiler/compile.spec.js
+++ b/test/weex/compiler/compile.spec.js
@@ -3,28 +3,28 @@ import { compile } from '../../../packages/weex-template-compiler'
 describe('compile basic', () => {
   it('should be compiled', () => {
     const { render, staticRenderFns, errors } = compile(`<div>{{hi}}</div>`)
-    expect(render).toEqual(`with(this){return _h('div',[_s(hi)])}`)
+    expect(render).toEqual(`with(this){return _c('div',[_v(_s(hi))])}`)
     expect(staticRenderFns.length).toBe(0)
     expect(errors).toEqual([])
   })
 
   it('should compile data bindings', () => {
     const { render, staticRenderFns, errors } = compile(`<div :a="b"></div>`)
-    expect(render).toEqual(`with(this){return _h('div',{attrs:{"a":b}})}`)
+    expect(render).toEqual(`with(this){return _c('div',{attrs:{"a":b}})}`)
     expect(staticRenderFns).toEqual([])
     expect(errors).toEqual([])
   })
 
   it('should compile event bindings', () => {
     const { render, staticRenderFns, errors } = compile(`<div @click="x"></div>`)
-    expect(render).toEqual(`with(this){return _h('div',{on:{"click":x}})}`)
+    expect(render).toEqual(`with(this){return _c('div',{on:{"click":x}})}`)
     expect(staticRenderFns).toEqual([])
     expect(errors).toEqual([])
   })
 
   it('should compile data bindings with children', () => {
     const { render, staticRenderFns, errors } = compile(`<foo :a="b"><text>Hello</text></foo>`)
-    expect(render).toEqual(`with(this){return _h('foo',{attrs:{"a":b}},[_h('text',["Hello"])])}`)
+    expect(render).toEqual(`with(this){return _c('foo',{attrs:{"a":b}},[_c('text',[_v("Hello")])])}`)
     expect(staticRenderFns).toEqual([])
     expect(errors).toEqual([])
   })
@@ -38,7 +38,7 @@ describe('compile basic', () => {
         <text style="margin-left:36px;color:#eee;">Load more...</text>
       </refresh>
     `)
-    expect(render).toEqual(`with(this){return _h('refresh',{staticClass:["refresh"],staticStyle:{flexDirection:"row"},attrs:{"display":displayRefresh},on:{"refresh":handleRefresh}},[_h('loading-indicator'),_h('text',{staticStyle:{marginLeft:"36px",color:"#eee"}},["Load more..."])])}`)
+    expect(render).toEqual(`with(this){return _c('refresh',{staticClass:["refresh"],staticStyle:{flexDirection:"row"},attrs:{"display":displayRefresh},on:{"refresh":handleRefresh}},[_c('loading-indicator'),_c('text',{staticStyle:{marginLeft:"36px",color:"#eee"}},[_v("Load more...")])])}`)
     expect(staticRenderFns).toEqual([])
     expect(errors).toEqual([])
   })