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.

  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

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  • 1
    ChineseBQB

    ChineseBQB

    Chinese sticker pack, more joy/museum of emoticon

    ChineseBQB is an openly shared repository of Chinese-style stickers and memes, essentially a “meme pack / sticker museum” — curated and maintained to collect, categorize, and make accessible a large collection of expressive GIFs and images often used in chats. The repository organizes stickers contributed by many people, and uses a Node.js build script to automatically generate an index of all images, so that users can browse the entire gallery online. The goal is cultural and social: making it easy for “sticker warriors” to find, contribute, and reuse Chinese-style memes for chat, social media, or projects. Because all assets are stored in the repo (or can be downloaded via Git), the collection is transparent, free to use (subject to any licensing / reuse norms), and publicly visible — so contributors get credit for their submissions.
    Downloads: 0 This Week
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  • 2
    Chokidar

    Chokidar

    Minimal and efficient cross-platform file watching library

    Chokidar is a solution for all the users of Node.js fs.watch who are tired of it not reporting filenames on MacOS and events at all when using editors like Sublime on MacOS. Node.js fs.watch often reports events twice, emits most changes as rename, and it does not provide an easy way to recursively watch file trees nor supports recursive watching on Linux. Same as with Node.js fs.watchFile. Therefore, Chokidar resolves these problems. Initially made for Brunch (an ultra-swift web app build tool), it is now used in Microsoft's Visual Studio Code, gulp, karma, PM2, browserify, webpack, BrowserSync, and many others. It has proven itself in production environments. Chokidar does still rely on the Node.js core fs module, but when using fs.watch and fs.watchFile for watching, it normalizes the events it receives, often checking for truth by getting file stats and/or dir contents.
    Downloads: 0 This Week
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  • 3
    ChromeAppHeroes

    ChromeAppHeroes

    Chinese manual for excellent Chrome plug-ins

    ChromeAppHeroes appears to be a repository with sample or template Chrome apps/extensions — perhaps intended to help developers learn how to build Chrome applications, quick prototypes, or small utilities. As such, it likely includes boilerplate code, manifest definitions, example UI components, and sample functionality (e.g. browser-action buttons, content scripts, background scripts) to illustrate how to structure a Chrome app. For learners or developers new to Chrome extension/app development, ChromeAppHeroes could serve as a starting kit: instead of starting from scratch, they can clone or fork the repo and immediately begin building features, thereby speeding up development. The repository’s open-source nature means users are free to adapt, extend, or repurpose the sample apps to their own needs — for example, privacy tools, quick productivity extensions, or custom browser tooling.
    Downloads: 0 This Week
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  • 4
    Classnames

    Classnames

    A simple javascript utility for conditionally joining classNames

    Classnames is a minimal JavaScript utility that helps you construct CSS class strings based on conditional logic. Instead of manually concatenating strings, developers can pass any combination of strings, arrays, or objects, and the library will output a clean, space-separated class list. When you provide an object, the keys represent class names and the boolean values determine whether each class should be included in the final string. This reduces boilerplate and the risk of typos or stray spaces, especially in React, Vue, or other component-based UIs where dynamic styling is common. The utility is small and framework-agnostic, so it can be used in Node, browser code, or any bundler setup including Browserify and Webpack. It maintains backwards compatibility while evolving (for example, introducing polyfill requirements for older browsers in newer versions), and it ships with TypeScript bindings for better type safety.
    Downloads: 0 This Week
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  • 5
    Closure Library

    Closure Library

    Google's common JavaScript library

    The Closure Library is a broad, well-tested, modular, and cross-browser JavaScript library. You can pull just what you need from a large set of reusable UI widgets and controls, and from lower-level utilities for DOM manipulation, server communication, animation, data structures, unit testing, rich-text editing, and more. The Closure Library is server-agnostic and is intended for use with the Closure Compiler. The Closure Library serves as the base JavaScript library for many Google products. Now that the Closure Library is open source, more and more developers outside Google are integrating the library in their own projects. If you are developing a large or growing application, you may benefit from the Closure Library's breadth. A well-tested library can insulate you from cross-browser compatibility issues and the minutiae of client-side programming, letting you focus on the fun stuff.
    Downloads: 0 This Week
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  • 6
    Complete Node Bootcamp

    Complete Node Bootcamp

    Starter files, final projects and FAQ for my Complete Node.js Bootcamp

    Complete Node Bootcamp is the official course-material repository for Jonas Schmedtmann’s Complete Node.js, Express, and MongoDB Bootcamp. It contains starter files, finished project files, and course support material for building backend applications with JavaScript. The repository is centered on practical server-side development, including Node.js fundamentals, Express APIs, MongoDB data modeling, authentication, security, payments, deployment, and real-world backend architecture. Learners can use the starter files to follow the lessons and compare their code with the final versions when something breaks. It also includes slides and FAQ-style guidance to make the course easier to navigate. The project is best understood as a hands-on educational workspace for learning production-minded Node.js development.
    Downloads: 0 This Week
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  • 7
    ConvNetJS

    ConvNetJS

    Deep learning in Javascript to train convolutional neural networks

    ConvNetJS is a Javascript library for training Deep Learning models (Neural Networks) entirely in your browser. Open a tab and you're training. No software requirements, no compilers, no installations, no GPUs, no sweat. ConvNetJS is an implementation of Neural networks, together with nice browser-based demos. It currently supports common Neural Network modules (fully connected layers, non-linearities), classification (SVM/Softmax) and Regression (L2) cost functions, ability to specify and train Convolutional Networks that process images, and experimental Reinforcement Learning modules, based on Deep Q Learning. The library allows you to formulate and solve Neural Networks in Javascript. If you would like to add features to the library, you will have to change the code in src/ and then compile the library into the build/ directory. The compilation script simply concatenates files in src/ and then minifies the result.
    Downloads: 0 This Week
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  • 8
    Countable

    Countable

    Add live paragraph-, word- and character-counting to an HTML element

    Countable is a JavaScript function to add live paragraph-, word- and character-counting to an HTML element. Countable is a zero-dependency library and comes in at 1KB when minified and gzipped. Countable is available as a Node / CommonJS module, an AMD module and as a global. All methods are accessed on the Countable object directly. The on and count methods both accept a callback. The given callback is then called whenever needed with a single parameter that carries all the relevant data. this is bound to the current element.
    Downloads: 0 This Week
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  • 9
    Crossfilter

    Crossfilter

    Fast n-dimensional filtering and grouping of records

    Crossfilter is a JavaScript library for exploring large multivariate datasets in the browser. Crossfilter supports extremely fast (<30ms) interaction with coordinated views, even with datasets containing a million or more records; we built it to power analytics for Square Register, allowing merchants to slice and dice their payment history fluidly. Since most interactions only involve a single dimension, and then only small adjustments are made to the filter values, incremental filtering and reducing is significantly faster than starting from scratch. Crossfilter uses sorted indexes (and a few bit-twiddling hacks) to make this possible, dramatically increasing the performance of live histograms and top-K lists. Crossfilter is available under the Apache License.
    Downloads: 0 This Week
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  • 10
    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
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  • 11
    CubeScribe

    CubeScribe

    Render Rubiks Cube OLL and PLL Algorithm Diagrams with HTML5 & JS

    A simple JavaScript class that utilizes the HTML 5 canvas element to render the face diagrams often used to document Rubik's Cube algorithms.
    Downloads: 0 This Week
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  • 12
    CyC2018.github.io

    CyC2018.github.io

    Personal knowledge site built with GitHub Pages

    This is a personal knowledge site built with GitHub Pages, organizing computer science notes and study materials in a browsable format. It aggregates content across algorithms, data structures, networking, operating systems, databases, and interview preparation into a coherent index. The presentation emphasizes succinct explanations paired with diagrams, tables, or code snippets to speed recall. Because the site is generated from a repository, it benefits from issue tracking, pull requests, and version history, making it easy to update and maintain. The structure encourages incremental learning: you can dip into a topic, follow internal links, and return later with a clear sense of progress. It doubles as both a study guide for learners and a quick reference for practitioners revisiting fundamentals.
    Downloads: 0 This Week
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  • 13
    D-Parts Web Application Framework
    D-Parts es un framework para Aplicaciones Web, netamente en lenguaje PHP, con acceso a bases de datos MySQL.
    Downloads: 0 This Week
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  • 14
    DO180-apps

    DO180-apps

    DO180 Repository for Sample Applications

    DO180-apps is an open source repository maintained by Red Hat Training that provides sample applications for the DO180 course, which focuses on container basics using Red Hat OpenShift. The repository includes multiple small applications written in different languages, such as Node.js, PHP, and simple front-end examples, designed to demonstrate containerization, deployment, and scaling on OpenShift. Learners use these apps to practice building, deploying, and managing workloads in a containerized environment. Each example is lightweight and structured to highlight specific OpenShift capabilities without unnecessary complexity. The repository plays a key role in hands-on labs and exercises for container training.
    Downloads: 0 This Week
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  • 15
    DOMtastic

    DOMtastic

    Small, fast, and modular DOM and event library for modern browsers

    Small, fast, and modular DOM and event library for modern browsers. Same familiar API as jQuery (but without the extra "weight" of modules like $.ajax, $.animate, and $.Deferred). Dependency-free. Weighs in at only 1KB to 12KB (minified), depending on the included modules. The full bundle is about 4KB gzipped. DOMtastic also serves as a starting point for your own application-specific DOM API (read more). Rollup and babel are used to create a UMD bundle (supporting AMD, CommonJS, and fallback to browser global).
    Downloads: 0 This Week
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  • 16
    DXcharts Lite

    DXcharts Lite

    Flexible open source financial charting library

    Why choose DXcharts Lite? - User-friendly interface. DXcharts Lite provides a seamless intuitive user experience with automatic scale zoom, mouse wheel zoom, and chart scrolling. - Versatile chart types. The Lite version supports eight chart types. The platform streams real-time data updates allowing users to stay on top of market movements. - Comprehensive market coverage. DXcharts Lite provides a wide-ranging selection of asset classes and extensive market coverage. This includes a variety of financial instruments such as stocks, forex, cryptocurrencies, and more. - Efficiency and speed. The platform uses HTML5 based on canvas to ensure smooth chart loading and data processing. - Snapshots. The snapshot feature is a handy tool that allows users to take and share chart snapshots anywhere. - Customisation. The platform offers users the ability to personalise their workspace allowing traders to customise their own theme or choose between the predefined dark or white ones.
    Downloads: 0 This Week
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  • 17
    Darkmode.js

    Darkmode.js

    Add a dark-mode / night-mode to your website in a few seconds

    Darkmode.js is a lightweight JavaScript library that enables websites to easily implement a dark mode toggle. It provides a floating switch for users to switch between light and dark themes without requiring major modifications to the website’s codebase.
    Downloads: 0 This Week
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  • 18
    DateTimePicker

    DateTimePicker

    Responsive jQuery DateTime Picker plugin for Web & Mobile

    DateTime Picker is a quick highly customizable jQuery plugin. The design is clutter-free & well-suited for embedding it into mobile application development. Users can change values using +/- buttons or type values directly into the textbox by selecting each value field. For the web, the picker can be bound relative to the reference element, were it will appear at the bottom of the element. For mobile, the picker can appear as a dialog box covering the entire window.
    Downloads: 0 This Week
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  • 19
    Dragula

    Dragula

    Drag and drop so simple it hurts

    Dragula is a lightweight JavaScript library that makes drag-and-drop between containers in the browser extremely simple. You provide one or more container elements and it handles all the DOM event wiring so users can drag items within and between containers with natural behavior. By default, any element in those containers can be picked up and dropped in any other container in the group, with sensible rules for what happens if the item is dropped elsewhere. The library includes configuration hooks for customizing what counts as a valid container, whether items are movable, where they can be dropped, and how they behave when “spilled” outside of containers. It works across modern browsers and even older ones, focusing on minimal dependencies and a straightforward API. The included CSS gives you a basic visual style for dragged items and placeholder states, while still being easy to override with your own styles.
    Downloads: 0 This Week
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  • 20
    Ducks

    Ducks

    A starter boilerplate for a universal webapp

    Ducks Modular Redux is a proposal for organizing Redux logic into self-contained feature modules. Each duck keeps a reducer, action types, action creators, and optional side effects in one file instead of scattering them across folders. The convention requires a default reducer export and named action-creator exports. Action types use a namespaced format that includes the application or package, reducer name, and action name. This structure makes features easier to move, reuse, publish, and reason about independently. Ducks remain compatible with combineReducers, bindActionCreators, thunks, sagas, and other common Redux patterns. The repository documents the rules, provides examples, includes translations, and points to libraries and generators inspired by the proposal.
    Downloads: 0 This Week
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  • 21
    Dumper.js

    Dumper.js

    A better and pretty variable inspector for your Node.js applications

    Dumper.js is a small JavaScript utility for pretty-printing or serializing JavaScript objects and data structures in a human-readable, tree-like format — useful for debugging, logging, or inspecting complex nested data. When you pass an object (or array, or nested structure) through dumper.js, it outputs a representation that shows keys, nested depth, and structure clearly, making it easier to understand what’s inside compared to default JSON dumps or console.log clutter. This can be especially helpful when dealing with large objects, deeply nested responses, or when you need to inspect something quickly without building custom serializers. The utility is minimal and straightforward: you import it, pass your data, and get the result. Because it doesn’t rely on heavy dependencies, it can be easily included in small scripts or bigger projects alike.
    Downloads: 0 This Week
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  • 22
    EJS

    EJS

    Embedded JavaScript templates for node

    EJS is a templating engine for JavaScript/Node.js that allows developers to embed plain JavaScript code into HTML markup. The idea is to avoid introducing a separate DSL for templating and instead use familiar JavaScript logic inside template tags to generate dynamic content. You write templates using <% %> scriptlet tags, <%= %> for output, and you can include other templates, pass data, and control flow with loops and conditionals. It’s fast because it compiles templates to JavaScript functions and caches them by default, so subsequent rendering is efficient. EJS supports both server-side render (in Node/Express) and client-side use in the browser, making it versatile for universal apps. Because you’re using raw JS, debugging is simple—the errors are standard JS stack traces with template line numbers included. While it doesn’t impose a rigid structure (you’re free to organize templates however you like), it works reliably and is simple to adopt.
    Downloads: 0 This Week
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  • 23
    ELADMIN-WEB

    ELADMIN-WEB

    front-end source code, project based on Spring Boot 2.7.18

    ELADMIN-WEB is the front-end source code for the ELADMIN JPA admin system. It is built around Vue and Element UI for a separated front-end and back-end management platform. The broader ELADMIN stack connects with Spring Boot, Spring Data JPA, Spring Security, Redis, and other back-end services. The web project provides the administrative interface that users interact with for system management tasks. It is useful for developers who want a ready-made Vue admin template tied to a Java enterprise back end. Overall, it serves as the UI layer for building permission-based dashboards, CRUD screens, operational tools, and internal management systems.
    Downloads: 0 This Week
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  • 24
    ES6 Shim

    ES6 Shim

    ECMAScript 6 compatibility shims for legacy JS engines

    ES6 Shim is a JavaScript compatibility library that adds ECMAScript 6 behavior to older JavaScript engines where possible. It provides polyfills and shims so legacy environments can run code that expects newer standard features. The project covers many ES6 APIs and attempts to align older browsers with the final ECMAScript 2015 specification. It is useful for applications that need broader browser support while still using modern JavaScript patterns. The library is distributed through common JavaScript package workflows and can be included in projects that target older runtimes. Although modern browsers have reduced the need for it, es6-shim remains an important historical and practical tool for compatibility-focused web development.
    Downloads: 0 This Week
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  • 25
    EditorASP

    EditorASP

    Usercontrol ASP WYSIYG Editor

    Simple editor para crear documentos. Es un control de usuario para que pueda ser implementado fácilmente a cualquier proyecto ASP.NET. Mejoras necesarias * Insertar parrafos correctamente * Situar el cursor al final del parrafo recien insertado * Estandariacion del manejo de la base de datos Ademas se podrian mejorar muchas otras cosas. Espero que entre todos podamos mejorar esta utilidad. El archivo a dercargar contiene todas las carpetas necesarias, que en el repositorio si esta vacia no la pone. En el codigo faltan las carpetas /Dat /Images /Logs Puedes verlo funcionando en http://www.drualcman.somee.com/ Mas informacion en https://aprende-a-programar.com/b/Editor-WYSIWYG-para-ASP/
    Downloads: 0 This Week
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