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

    Polymer

    A Web Component library

    Polymer is a lightweight Web Components library that lets you create encapsulated Web Components that work just like standard HTML elements. These elements can be used in building web applications and are reusable. Polymer can be particularly useful when building UI components. Instead of having to constantly rebuild components such as a specific navigation bar or button in different frameworks and for different projects, simply define this component once with Polymer, and you can use it again and again in your future projects. Because Polymer is built on top of the web standards-based Web Components APIs, custom HTML elements made from it are built totally from the platform up and are interoperable across frameworks. Polymer also works across all major browsers.
    Downloads: 1 This Week
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  • 2
    Prism

    Prism

    Lightweight, robust, elegant syntax highlighting

    Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind. It’s used in millions of websites, including some of those you visit daily.
    Downloads: 1 This Week
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  • 3
    React Projects

    React Projects

    Collection of React example / tutorial projects

    This repository is a collection of small-to-medium React applications that showcase practical patterns, from stateful widgets to multi-page interfaces. Each project is self-contained and demonstrates specific techniques—hooks for state and effects, context for global state, custom hooks for reuse, and reducer patterns for complex updates. The codebases include common UI tasks like forms, modals, lists, filtered search, and pagination, along with data fetching and basic routing where appropriate. Because every project focuses on a narrow set of concepts, learners can clone a single folder, run it, and grasp the idea without wading through a monolith. The examples are structured to be approachable yet idiomatic, encouraging good habits while staying close to what developers actually build. Over time, the collection functions as a portfolio of reference implementations that students and practitioners can adapt to new projects.
    Downloads: 1 This Week
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  • 4
    React Rainbow

    React Rainbow

    React Rainbow Components. Build your web application in a snap

    React Rainbow is a collection of components that will reliably help you build your application in a snap. Give it a hack and let us know what you think. We designed each component with i18n in mind. Any new component or feature we may add in the future has to be able to work fully in different locales. Proper documentation based on interactive examples to help you understand the features of each component. We know how important it for you is to test your UI. Our npm package provides a webdriver.io page object for almost every component. Our components are test infected. We like to test our components as much as possible.
    Downloads: 1 This Week
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  • 5
    Resumable.js

    Resumable.js

    Library for providing multiple uploads via the HTML5 File API

    Resumable.js is a JavaScript library providing multiple simultaneous, stable and resumable uploads via the HTML5 File API. The library is designed to introduce fault-tolerance into the upload of large files through HTTP. This is done by splitting each file into small chunks. Then, whenever the upload of a chunk fails, uploading is retried until the procedure completes. This allows uploads to automatically resume uploading after a network connection is lost either locally or to the server. Additionally, it allows for users to pause, resume and even recover uploads without losing state because only the currently uploading chunks will be aborted, not the entire upload. Resumable.js does not have any external dependencies other than the HTML5 File API. This is relied on for the ability to chunk files into smaller pieces. Currently, this means that support is widely available in to Firefox 4+, Chrome 11+, Safari 6+ and Internet Explorer 10+.
    Downloads: 1 This Week
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  • 6
    Riot

    Riot

    Simple and elegant component-based UI library

    Why do we need a new UI library? The frontend space is indeed crowded, but we honestly feel the solution is still “out there”. We believe Riot.js offers the right balance for solving the great puzzle. Riot.js brings custom elements to all modern browsers without the use of any polyfill! A custom element glues relevant HTML and JavaScript together forming a reusable component. It is designed to offer you everything you wished native the web components API looked like. HTML syntax is the de facto language of the web and it’s designed for building user interfaces. The syntax is explicit, nesting is inherent to the language, and attributes offer a clean way to provide options for custom tags. Minimalism sets Riot.js apart from others. One of the design goals was to introduce a powerful tag syntax with as little boilerplate as possible. Riot.js has between 10 and 100 times fewer API methods than other UI libraries.
    Downloads: 1 This Week
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  • 7
    Sandia Cyber Omni Tracker

    Sandia Cyber Omni Tracker

    Sandia Cyber Omni Tracker (SCOT)

    SCOT is an open-source cybersecurity incident response and threat intelligence management system developed by Sandia National Laboratories. It centralizes alert collection, facilitates team collaboration, and enriches data with automated analysis, enhancing the efficiency and effectiveness of security operations teams.
    Downloads: 1 This Week
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  • 8
    SiriWave

    SiriWave

    The Apple® Siri wave-form replicated in a JS library

    The "Apple Siri" wave is replicated in pure Javascript using the Canvas API. To learn more about the project, read the blog post, and check the demo or code pen. Import the UMD package via the unpkg CDN and it's ready to use. Create a div container and instantiate a new SiriWave object. Stop the animation and destroy the canvas, by removing it from the DOM. Subsequent start() calls on this SiriWave instance will fail with an exception.
    Downloads: 1 This Week
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  • 9
    Spectacle

    Spectacle

    A ReactJS based Presentation Library

    Spectacle is an open source presentation library based on React.js. It lets you create sleek presentations using JSX syntax, giving you the ability to live demo your code. Spectacle’s presentations are lively and interactive, with clickable elements, themes, custom backgrounds, animations, and many other fun and unique elements you can add to make your presentations pop. With Spectacle you can also live demo your code in real time without having to leave the presentation deck. Code blocks conveniently auto-size and scroll when there is an overflow of content. See the live demo deck at: https://raw.githack.com/FormidableLabs/spectacle/main/examples/one-page.html
    Downloads: 1 This Week
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  • 10
    SurveyJS

    SurveyJS

    JavaScript Survey and Form Library

    SurveyJS Form Library is distributed as npm packages and as scripts and style sheets that you can reference on your page. You can use it in any React, Angular, Vue, Knockout, or jQuery application. React, Angular, Knockout, and Vue3 are supported natively. To communicate with the server, the libraries use JSON objects that represent form schemas (content and layout of a form) and form results (answers). You have the option to build dynamic JSON-driven forms using our free full-featured form builder demo available on the website. Alternatively, you can integrate the form builder library and create forms using a drag-and-drop UI directly within your own application. With years of development and support behind us, we've assisted hundreds of companies across various industries. With Survey, you can create nearly anything that popular cloud services offer. Furthermore, our library is fully extensible, allowing you to modify its behavior to suit your specific needs.
    Downloads: 1 This Week
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  • 11
    Venom

    Venom

    Venom is the most complete javascript library for Whatsapp

    Venom is a high-performance system developed with JavaScript to create a bot for WhatsApp, support for creating any interaction, such as customer service, media sending, sentence recognition based on artificial intelligence and all types of design architecture for WhatsApp. It's a high-performance alternative API to whatzapp, you can send, text messages, files, images, videos and more. Remember, the API was developed on a platform called RESTful Web services, providing interoperability between computer systems on the Internet. It uses a set of well-defined operations that apply to all information resources, HTTP itself defines a small set of operations, the most important being post, get, put and delete. Use it in your favorite language like PHP, Python, C# and others. as long as your language is supported with the HTTP protocol, you will save time and money. you don't need to know how Venom works, we have the complete API documentation, in a professional way!
    Downloads: 1 This Week
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  • 12
    Zebra Datepicker

    Zebra Datepicker

    Super-lightweight, highly configurable, cross-browser date time picker

    A super-lightweight, highly configurable, cross-browser date time picker jQuery plugin. Enhance your forms with the powerful and highly-configurable Zebra Datepicker date time picker jQuery plugin. This date time picker adds an intuitive calendar interface for selecting dates and times, complete with a convenient month and year jump feature. The selected date will be formatted and entered into the input field according to your specified options. Simply attach the plugin to your input fields and let the calendar icon do the rest.
    Downloads: 1 This Week
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  • 13
    Zebra Dialog

    Zebra Dialog

    A small, compact, and highly configurable jQuery plugin

    A small, compact, and highly configurable jQuery plugin for creating modal dialog boxes. Zebra Dialog is a small, compact (one JavaScript file, no dependencies other than jQuery 1.7.0+) and highly configurable jQuery plugin for creating responsive modal dialog boxes, meant to replace native JavaScript alert, confirmation, and prompt dialogs. Can also be used as a notification widget (when configured to show no buttons and to close automatically) for updates or errors, without distracting users from their browser experience by displaying obtrusive alerts. Works in pretty much any browser, Firefox, Chrome, Safari, Edge, Opera, and Internet Explorer 6+
    Downloads: 1 This Week
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  • 14
    cube-ui

    cube-ui

    Mobile UI library implement by Vue

    cube-ui is an elegant mobile component library based on Vue.js. From DiDi interior component library and has been put to business test for more than one year. Every component has full unit tests to provide assurance for continuous integration. Make quick response, fluent animation and close to native components as the goal, and pursue the perfection of the interactive experience. Follow a uniform design interaction standard and highly restore the design; Standardize the interface and unify the way of use, making development more simple and efficient. Lightweight and flexible, support post-compile and importing on demand; High scalability, it is easy to implement secondary development based on existing components. By API invoking, the popup layer is attached to body element whose advantage is that it wouldn't be affected by outer styles. If using component invoking, it's fairly easy to be affected by outer styles like transform, overflow, etc.
    Downloads: 1 This Week
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  • 15
    discord.io

    discord.io

    A small, single-file library for creating DiscordApp clients

    A small, single-file, fully featured Discordapp library for Node.js and browsers.
    Downloads: 1 This Week
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  • 16
    egjs

    egjs

    Javascript components group that brings easiest way to build web apps

    egjs is Javascript components group that brings easiest and fastest way to build a web application in your way.
    Downloads: 1 This Week
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  • 17
    fullPage.js

    fullPage.js

    Create beautiful fullscreen scrolling websites fast and easy

    fullPage.js is an easy-to-use library for creating beautiful, fullscreen scrolling websites/ onepage sites/ single page websites complete with all the features you need. With fullPage.js you can add landscape sliders and links to sections of your site, create smaller or bigger sections, use extensions and more! fullPage.js is compatible with all modern browsers and even some old ones like IE9 and Opera 12. It also provides touch support designed for mobile devices and touch screen computers. fullPage.js is fully supported by a great community, has good documentation and offers plenty of examples to get you started quickly. See these examples on the official website: http://alvarotrigo.com/fullPage/
    Downloads: 1 This Week
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  • 18
    glMatrix

    glMatrix

    Javascript Matrix and Vector library for High Performance WebGL apps

    Javascript has evolved into a language capable of handling realtime 3D graphics, via WebGL, and computationally intensive tasks such as physics simulations. These types of applications demand high performance vector and matrix math, which is something that Javascript doesn't provide by default. glMatrix to the rescue! glMatrix is designed to perform vector and matrix operations stupidly fast! By hand-tuning each function for maximum performance and encouraging efficient usage patterns through API conventions, glMatrix will help you get the most out of your browsers Javascript engine.
    Downloads: 1 This Week
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  • 19
    heatmap.js

    heatmap.js

    JavaScript Library for HTML5 canvas based heatmaps

    heatmap.js is a lightweight, easy to use JavaScript library to help you visualize your three dimensional data! Use it to add new value to your project, build a business based on it, study and visualize user behaviour, or why not build something completely crazy/awesome? Whether you want to have an aggregated overview of your users behaviour, or look at thousands of events distributed on a map, heatmap.js has all your heatmap visualization needs covered! Because it is the most advanced heat map visualization library on the web. It has a light footprint (~3kB gzip) and with the new 2.0 release heatmap.js just got faster and better. With only a few lines of code you can create your own interactive web heatmap. heatmap.js' API is all documented, also prioritized, so you can start developing right away! Heatmap.js is not a user behaviour tracking script. It simply creates dynamic heatmaps based on the data you feed it.
    Downloads: 1 This Week
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  • 20
    history

    history

    Manage session history with JavaScript

    The history library lets you easily manage session history anywhere JavaScript runs. A history object abstracts away the differences in various environments and provides a minimal API that lets you manage the history stack, navigate, and persist state between sessions. Development of the current stable release, version 5, happens on the master branch. Please keep in mind that this branch may include some work that has not yet been published as part of an official release. However, since master is always stable, you should feel free to build your own working release straight from master at any time. history is developed and maintained by React Training. If you're interested in learning more about what React can do for your company, please get in touch!
    Downloads: 1 This Week
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  • 21
    jQuery Google Maps Store Locator Plugin

    jQuery Google Maps Store Locator Plugin

    A store locator plugin using Google Maps API version 3

    This jQuery plugin takes advantage of Google Maps API version 3 to create an easy to implement store locator. No back-end programming is required, you just need to feed it KML, XML, or JSON data with all the location information. How you create the data file is up to you. I originally created this for a company that didn’t have many locations, so I just used a static XML file. You will need to geocode your locations beforehand or use a geocoding API service if you want to try to do it on the fly. The reason for this is that all free geocoding APIs have strict limits that would easily be exceeded. In the end, you're much better off storing the coordinates versus having to look them up for each location on each request.
    Downloads: 1 This Week
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  • 22
    jQuery MultiSelect

    jQuery MultiSelect

    Turn a multiselect list into a nice and easy to use list with checkbox

    Turn a multiselect list into a nice and easy to use list with checkboxes. This plugin is simply an alternative interface for the native select list element. When you check an option in the plugin the value is selected on the native list. This allows the value to be submitted in a form as well as retreived through normal POST/GET and javascript methods.
    Downloads: 1 This Week
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  • 23
    jQuery Responsive Tabs

    jQuery Responsive Tabs

    A jQuery plugin that provides responsive tab functionality

    Responsive Tabs is a jQuery plugin that provides responsive tab functionality. The tabs transform to an accordion when it reaches a CSS breakpoint. You can use this plugin as a solution for displaying tabs elegantly on desktop, tablet, and mobile. Tabs can start collapsing based on the view (optional) Tabs can be disabled. The tabs are controllable with API methods. Cross-browser compatibility (IE7+, Chrome, Firefox, Safari, and Opera) Multiple device support (Web, Tablet, Mobile, etc)
    Downloads: 1 This Week
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  • 24
    jquery.flowchart

    jquery.flowchart

    JQuery plugin that allows you to draw a flow chart

    Javascript jQuery plugin that allows you to draw a flow chart. jquery.flowchart.js is an open-source javascript jQuery ui plugin that allows you to draw and edit a flow chart. Methods are provided so that the end-user can edit the flow chart by adding/moving/removing operators, and creating/removing connections between them.
    Downloads: 1 This Week
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  • 25
    jscodeshift

    jscodeshift

    A JavaScript codemod toolkit

    jscodeshift is a toolkit for running codemods over multiple JavaScript or TypeScript files. It provides A runner, which executes the provided transform for each file passed to it. It also outputs a summary of how many files have (not) been transformed. A wrapper around recast, providing a different API. Recast is an AST-to-AST transform tool and also tries to preserve the style of original code as much as possible. As already mentioned, jscodeshift also provides a wrapper around recast. In order to properly use the jscodeshift API, one has to understand the basic building blocks of recast (and ASTs) as well. An AST node is a plain JavaScript object with a specific set of fields, in accordance with the Mozilla Parser API. The primary way to identify nodes is via their type. It's OK to not know the structure of every AST node type. The (esprima) AST explorer is an online tool to inspect the AST for a given piece of JS code.
    Downloads: 1 This Week
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