Browse free open source JavaScript Libraries and projects below. Use the toggles on the left to filter open source JavaScript Libraries by OS, license, language, programming language, and project status.

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  • 1
    Playwright

    Playwright

    Node library to automate Chromium, Firefox & WebKit with a single API

    Playwright is a Node library for automating Chromium, Firefox and WebKit using a single API. It supports headless execution for all these browsers on Linux, macOS and Windows, providing automated web browser interactions that are fast, capable, reliable and ever-green. Playwright enables a broad spectrum of cross-browser web automation capabilities, which are used by Single Page Apps and Progressive Web Apps. These include scenarios that span multiple pages, domains and iframes; emulation of mobile devices, geolocation, and permissions; upload and download files and many more.
    Downloads: 46 This Week
    Last Update:
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  • 2
    jQuery Validation Plugin

    jQuery Validation Plugin

    jQuery Validation Plugin library sources

    The jQuery Validation Plugin provides drop-in validation for your existing forms, while making all kinds of customizations to fit your application really easy. This jQuery plugin makes simple clientside form validation easy, whilst still offering plenty of customization options. It makes a good choice if you’re building something new from scratch, but also when you’re trying to integrate something into an existing application with lots of existing markup. The plugin comes bundled with a useful set of validation methods, including URL and email validation, while providing an API to write your own methods. All bundled methods come with default error messages in english and translations into 37 other languages. The plugin was initially written and maintained by Jörn Zaefferer, a member of the jQuery team, lead developer on the jQuery UI team and maintainer of QUnit. It was started back in the early days of jQuery in 2006, and updated and improved since then.
    Downloads: 12 This Week
    Last Update:
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  • 3
    Puppeteer

    Puppeteer

    Headless Chrome Node.js API

    Puppeteer is a headless Node library that provides a high level API for controlling Chromium or Chrome over the DevTools protocol. It requires zero setup and comes bundled with the Chromium version most suited to it. Puppeteer is headless by default, making it fast to run. However, it can also be set to run full or non-headless Chrome or Chromium, simply set the headless option when launching a browser. Many of the things you can do manually in the browser, you can also do with Puppeteer such as generate page screenshots and PDFs, crawl a Single-Page Application, test Chrome extensions and more.
    Downloads: 7 This Week
    Last Update:
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  • 4
    Playwright for .NET

    Playwright for .NET

    .NET version of the Playwright testing and automation library

    Playwright for .NET is the official language port of Playwright, the library to automate Chromium, Firefox and WebKit with a single API. Playwright is built to enable cross-browser web automation that is ever-green, capable, reliable and fast. Cross-browser. Playwright supports all modern rendering engines including Chromium, WebKit, and Firefox. Cross-platform. Test on Windows, Linux, and macOS, locally or on CI, headless or headed. Cross-language. Use the Playwright API in TypeScript, JavaScript, Python, .NET, Java. Test Mobile Web. Native mobile emulation of Google Chrome for Android and Mobile Safari. The same rendering engine works on your Desktop and in the Cloud. Auto-wait. Playwright waits for elements to be actionable prior to performing actions. It also has a rich set of introspection events. The combination of the two eliminates the need for artificial timeouts - the primary cause of flaky tests.
    Downloads: 6 This Week
    Last Update:
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  • 5
    Retire.js

    Retire.js

    Scanner detecting the use of JavaScript libraries

    There is a plethora of JavaScript libraries for use on the web and in node.js apps out there. This greatly simplifies, but we need to stay updated on security fixes. "Using Components with Known Vulnerabilities" is now a part of the OWASP Top 10 and insecure libraries can pose a huge risk for your web app. The goal of Retire.js is to help you detect the use of versions with known vulnerabilities. Scan a web app or node app for use of vulnerable JavaScript libraries and/or node modules. grunt-retire scans your grunt-enabled app for use of vulnerable JavaScript libraries and/or node modules. Scans visited sites for references to insecure libraries and puts warnings in the developer console. An icon on the address bar displays will also indicate if vulnerable libraries were loaded. Retire.js has been adapted as a plugin for the penetration testing tools Burp and OWASP ZAP.
    Downloads: 6 This Week
    Last Update:
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  • 6
    FastClick

    FastClick

    Easy-to-use library to remove click delays on browsers with touch UIs

    FastClick is a simple, easy-to-use library for eliminating the 300ms delay between a physical tap and the firing of a click event on mobile browsers. The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic. FastClick is developed by FT Labs, part of the Financial Times. Note: As of late 2015 most mobile browsers - notably Chrome and Safari - no longer have a 300ms touch delay, so fastclick offers no benefit on newer browsers, and risks introducing bugs into your application. Consider carefully whether you really need to use it. The library has been deployed as part of the FT Web App. FastClick doesn't attach any listeners on desktop browsers.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 7
    LBRY App

    LBRY App

    Browser and wallet for LBRY, the decentralized, user-controlled

    LBRY is a free, open, and community-run digital marketplace. Build the future of content freedom. What if anyone in the world could publish a piece of digital content, anyone else in the world could access it, for free or for payment, and that entire system worked end-to-end without any centralized authority or point of control? Looking for API documentation, formal specifications, how-tos, resources, or the meaning of life? Find at least some of these things in the resources area. No matter your experience or skill level, you can progress content freedom. This repo contains the UI code that powers the official LBRY desktop app. The LBRY app is a graphical browser for the decentralized content marketplace provided by the LBRY protocol. It is essentially the lbry daemon bundled with a UI using Electron.
    Downloads: 2 This Week
    Last Update:
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  • 8
    Masonry

    Masonry

    A cascading grid layout plugin

    Masonry is a JavaScript grid layout library. It works by placing elements in optimal position based on available vertical space, sort of like a mason fitting stones in a wall. You’ve probably seen it in use all over the Internet. All sizing and styling of items is handled by your own CSS. tem sizes can be set with percentages for responsive layouts. With the masonry layout mode, set percentage-width columnWidth with element sizing. Set percentPosition: true so item positions are likewise set with percentages to reduce adjustment transitions on window resize. Unloaded images can throw off Masonry layouts and cause item elements to overlap. imagesLoaded resolves this issue. imagesLoaded is a separate script you can download at imagesloaded.desandro.com. Or, initialize Masonry after all images have been loaded.
    Downloads: 2 This Week
    Last Update:
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  • 9
    URI.js

    URI.js

    Javascript URL mutation library

    URI.js is a javascript library for working with URLs. It offers a "jQuery-style" API (Fluent Interface, Method Chaining) to read and write all regular components and a number of convenience methods like .directory() and .authority(). URI.js offers simple, yet powerful ways of working with query string, has a number of URI-normalization functions and converts relative/absolute paths. While URI.js provides a jQuery plugin. URI.js itself does not rely on jQuery. You don't need jQuery to use URI.js. URI.js (without plugins) has a gzipped weight of about 7KB, if you include all extensions you end up at about 13KB. So unless you need second level domain support and use URI templates, we suggest you don't include them in your build. Clone the URI.js repository or use a package manager to get URI.js into your project. See the build tool or use Google Closure Compiler.
    Downloads: 1 This Week
    Last Update:
    See Project
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  • 10
    pidCrypt
    pidCrypt is no longer maintained! pidCrypt is a crypto library offering modular cryptographic functions in JavaScript. Supports: AES (CBC & CTR Mode), RSA, MD5, SHA-1, SHA-256, SHA-384, SHA-512, ASN.1, Base64, UTF-8. The AES-CBC mode is compatible to OpenSSL.
    Downloads: 1 This Week
    Last Update:
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  • 11
    This is a JavaScript library which gives the ability to use cryptographic functionality abstracted of available technologies on the browser side. It executes a cryptographic function with the fastest technology including Java, JavaScript and Flash.
    Downloads: 0 This Week
    Last Update:
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  • 12
    LocalJS
    Build Cloud Desktop Application with Web Pages. Deployed from Cloud, Run on Desktop, Developed with HTML + CSS + JavaScript. Two Simple Steps turn your HTML pages into Cloud Desktop Application: Find more at http://localjs.org/
    Downloads: 0 This Week
    Last Update:
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  • 13
    PDF API HTML5 Web Apps

    PDF API HTML5 Web Apps

    Mini SDK JavaScript API library PDF web apps

    A condensed library designed to web modern applications, to quickly export your content html to pdf thanks the famous library in javascript: jsPDF. And a special thanks to the project canvg and html2canvas. Project documentation: http://ulmdevice.altervista.org/pdfapihtml5/#documentation ========== Also available service for Angular 7+: http://ulmdevice.altervista.org/pdfjsapi/ Mobile Applications: http://bit.ly/1MrlgKk Opera add-on: http://bit.ly/1kkMhTa
    Downloads: 0 This Week
    Last Update:
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  • 14

    PassJS

    Giving a Cross-Browser JavaScript

    This library tries to hide differences between JavaScript implementations across browsers. This library is Licenced under the GNU GPLv3 Licence.
    Downloads: 0 This Week
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  • 15
    Zepto.js

    Zepto.js

    JavaScript library for modern browsers with a jQuery compatible API

    Zepto is a minimalist JavaScript library for modern browsers with a largely jQuery-compatible API. If you use jQuery, you already know how to use Zepto. While 100% jQuery coverage is not a design goal, the APIs provided match their jQuery counterparts. The goal is to have a ~5-10k modular library that downloads and executes fast, with a familiar and versatile API, so you can concentrate on getting stuff done. Zepto is open source software and is released under the developer and business-friendly MIT license. Note that some optional features of Zepto specifically target mobile browsers; as the original project goal was to specifically provide a leaner alternative to jQuery for the mobile web. Zepto is a good choice for browser extensions (for Safari, Chrome and Firefox) and to develop HTML-based views within native app frameworks, such as PhoneGap. In short, Zepto is expected to work in every modern browser and browser-like environment.
    Downloads: 0 This Week
    Last Update:
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  • 16
    Zreshk
    Zreshk is a tiny javascript library which provides basic needs of web developers such as AJAX and effects.
    Downloads: 0 This Week
    Last Update:
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  • 17
    chrome-extensions-examples

    chrome-extensions-examples

    All Chrome Extension examples collected into one repository

    This is not an official mirror of the Chrome extension examples. Report any issues with the examples themselves to Google's issue trackers/forums. The Chrome Extensions examples did not exist as a Git repository, and browsing both the samples page and the VCViewer did not seem particularly handy. So, I decided to scrape the content into this repository for easier browsing and (possible) editing.
    Downloads: 0 This Week
    Last Update:
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