Ember.js Controller init() Method
Last Updated :
26 Apr, 2025
Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.
The init() method is the method that is called whenever the object is created.
Syntax:
init(){ //algorithm...};
Steps to Install and Run Ember.js:
Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal:
npm install ember-cli
Step 2: Now you can create the project by typing in the following piece of code:
ember new <project-name> --lang en
To start the server, type:
ember serve
Example 1: Type the following code to generate the route for this example:
ember generate route init1
app/routes/init1.js
JavaScript
import Route from '@ember/routing/route';
export default class StudentsRoute extends Route {
p1 = [
'Digital Camera',
'Jugs, cups & straws',
'Balloons',
'Scissors',
'Cold Drink',
'Table',
];
model() {
return this.p1;
}
setupController(controller, model) {
super.setupController(controller, model);
controller.set('p1', this.p1);
}
}
app/controllers/init1.js
JavaScript
import Ember from 'ember';
export default Ember.Controller.extend({
value: 'value',
init() {
this._super(...arguments);
this.addObserver('value', this, 'Change');
alert('Controller Init() is initiated');
},
Change() {
console.log('value changed');
},
actions: {
remove(data) {
this.p1.set('[]', this.p1.without(data));
},
print() {
let ans = this.p1.set('[]');
alert(ans.join('\n'));
},
},
});
app/templates/init1.js
HTML
<ul>
<h3>List is : </h3>
{{#each @model as |party|}}
<li>{{party}}</li>
{{/each}}
</ul>
<br />
{{input value=this.value}}
<br />
<input
type="button"
id="check-atIndex"
value="Remove"
{{action "remove" this.value}}
/>
<br /><br />
<input
type="button"
id="print-item"
value="Print All Items"
{{action "print" this.value}}
/>
Output:
Ember.js Controller init() Method
Example 2: Type the following code to generate the route for this example:
ember generate route init2
app/controllers/init2.js
JavaScript
import Ember from "ember";
import { addObject, isAny, isEvery } from "@ember/array";
import EmberObject from '@ember/object';
const Fruit = EmberObject.extend({
init() {
alert(`Name is ${this.get('name')}`);
}
});
export default Ember.Controller.extend({
fruits: [Fruit.create({
'name': 'Lady Finger',
'isFruit': false,
'color': 'green'
}),
Fruit.create({
'name': 'Brinjal',
'isFruit': false,
'color': 'purple'
}),
Fruit.create({
'name': 'Apple',
'isFruit': true,
'color': 'red'
}),
Fruit.create({
'name': 'Grapes',
'isFruit': true,
'color': 'green'
})
],
actions: {
insertItem(data, data1, data2) {
let temp = Fruit.create({
name: data,
isFruit: data1,
color: data2
});
this.fruits.addObject(temp);
}
},
});
app/templates/init2.hbs
HTML
{{page-title "Init"}}
<h3>Here is a list of eatables: </h3>
<table>
<tr>
<th>Name</th>
<th>Fruit</th>
<th>Color</th>
</tr>
{{#each this.fruits as |detail|}}
<tr>
<td>{{detail.name}}</td>
<td>{{detail.isFruit}}</td>
<td>{{detail.color}}</td>
</tr>
{{/each}}
</table>
<br /><br />
<div>
<label>Enter Fruit Name: </label>
{{input value=this.item1}}
</div><br />
<div>
<label>Item is Fruit: </label>
{{input value=this.item2}}
</div><br />
<div>
<label>Enter Fruit color: </label>
{{input value=this.item3}}
</div><br />
<div>
<input
type="button"
id="insert-item"
value="Insert Fruit"
{{action "insertItem" this.item1 this.item2 this.item3}}
/>
</div>
{{outlet}}
Output:
Ember.js Controller init() Method
Reference: https://api.emberjs.com/ember/4.6/classes/Controller/methods/init?anchor=init