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
    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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  • 2
    Earth Engine API

    Earth Engine API

    Python and JavaScript bindings for calling the Earth Engine API

    The Earth Engine API provides Python and JavaScript client libraries for Google Earth Engine, a planetary-scale geospatial analysis platform. With it, users compose lazy, server-side computations over massive catalogs of satellite imagery and vector datasets without handling raw files locally. The API exposes functional operators for map algebra, reducers, joins, and machine learning that scale transparently on Earth Engine’s backend. Developers authenticate once, work interactively in notebooks or the Code Editor, and export results to Cloud Storage, Drive, or asset collections. Visualization helpers render tiled layers and charts so analysts can iterate quickly on workflows like land-cover mapping, change detection, or time-series analysis. By combining petabyte-scale data with concise functional transforms, the API turns complex remote-sensing pipelines into reproducible scripts that are easy to share.
    Downloads: 0 This Week
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  • 3
    EaselJS

    EaselJS

    Work with the HTML5 Canvas element easily

    The Easel Javascript library provides a full, hierarchical display list, a core interaction model, and helper classes to make working with the HTML5 Canvas element much easier. A JavaScript library that makes working with the HTML5 Canvas element easy. Useful for creating games, generative art, and other highly graphical experiences. EaselJS provides straight forward solutions for working with rich graphics and interactivity with HTML5 Canvas. It provides an API that is familiar to Adobe Animate developers, but embraces JavaScript sensibilities. It consists of a full, hierarchical display list, a core interaction model, and helper classes to make working with Canvas much easier. Added drawPolygon(), pg() and Polygon() Added commands for drawing a polygon from an array of point arrays [[x,y],[x,y],etc] with tiny API of pg as dp is already taken for polystar.
    Downloads: 0 This Week
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  • 4
    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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  • 5
    Element

    Element

    A Vue.js 2.0 UI Toolkit for Web

    Element is a component library based on Vue.js 2.0 that can be used by developers, designers and product managers to build products that are logically sound, well-structured and easy to use. Element uses BEM-styled CSS so you can easily change styles when you want to. There are four ways you can change style variables. You can use the online theme roller to customize design tokens and preview new themes in real-time. You can also use the theme preview website (for changing the theme color only), update SCSS variables, or use the CLI theme tool. You can also import your own custom themes.
    Downloads: 0 This Week
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  • 6

    Elevate EXtreme Project

    Sistema para gerenciamento de projetos Elevate

    PT_BR: O objetivo do ELXP é dispor de uma ferramenta simples para controle de "pendência" de um projeto Extreme. EN: The goal is to have the ELXP a tool simple to control "pending" for a project Extreme. http://www.elevate.com.br
    Downloads: 0 This Week
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  • 7
    EmbeVi
    EmbeVi Project - Auto Embed Video From Link
    Downloads: 0 This Week
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  • 8
    Emoji Mart

    Emoji Mart

    One component to pick them all

    Data required for the picker to work has been completely decoupled from the library. That gives developers the flexibility to better control their app bundle size and let them choose how and when this data is loaded. Callback when the Add custom emoji button is clicked. The button will only be displayed if this callback is provided. It is displayed when search returns no results. You can use custom emojis by providing an array of categories and their emojis. Emojis also support multiple skin tones and can be GIFs or SVGs. You can use custom category icons by providing an object with the category name as key and the icon as value. Currently supported formats are svg string and src. First, you need to make sure data has been initialized. You need to call this only once per page load. Note that if you call init like this, you don’t necessarily need to include data in your Picker props. It doesn’t hurt either, it will noop.
    Downloads: 0 This Week
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  • 9
    Emoji-Log

    Emoji-Log

    An Emoji Git commit log messages spec standard

    After building hundreds of open source software I've ended up inventing a git commit log standard called EMOJI-LOG that helps me understand a project's history with a less cognitive load just by looking at the git log. I like emoji. I like ’em a lot. Programming, code, geeks/nerds, open-source, all of that is inherently dull and sometimes boring. Emoji (which is, in fact, the plural of emoji) helps me add colors and emotions to the mix. Nothing wrong if you want to attach feelings to this 2D flat text-based world of code. I found out that instead of memorizing hundreds of emoji it's better to keep the categories small and general.
    Downloads: 0 This Week
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  • 10

    Empact Foundation Class Library

    Cross-platform C++ library for use as a default application framework.

    A mature cross-platform C++ library for use as a default application framework. Features include: * Threading & synchronization * Socket programming: SSL, NanoMsg & ZMQ * File I/O utilities: zlib, ini, yaml * Native Database access: MySQL, SQLite, BerkleyDB, Postgre, REDIS and ODBC * Built-in mini XML parser; optional EXPAT, LIBXML and MSXML support * Network protocol stack: HTTP, FTP, SMTP, POP3, SOAP, XMLRPC * Scripting languages: Perl, Python, JavaScript, VBScript, Java, Lua, TCL, Squirrel * Cloud Computing: AWS * Encryption: OpenSSL * Platforms: Linux/Posix, Windows, Arduino * Over 500+ highly reusable classes. 4000+ fully documented functions. Follow the 'Wiki' link above to explore everything about the framework.
    Downloads: 0 This Week
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  • 11
    End-To-End

    End-To-End

    End-To-End is a crypto library to encrypt, decrypt, digital sign

    End-to-End was a client-side encryption project that prototyped OpenPGP-compatible, end-to-end encrypted messaging in the browser. The idea was to move cryptographic operations entirely to the user’s machine—key generation, encryption, and signature—so messages remain unreadable to intermediaries. It packaged a JavaScript crypto library, UI elements, and a browser extension workflow that could integrate with webmail-style UIs without server changes. The codebase emphasized careful key handling, usability experiments around key discovery and verification, and mitigations against common web threats like XSS. While the project ultimately transitioned into successor efforts, it helped push discussions about practical E2EE in mainstream web apps and the ergonomics of PGP-style workflows. Security researchers and product teams used it as a design reference for client-side cryptography and the trade-offs of operating inside a hostile web page.
    Downloads: 0 This Week
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  • 12
    Eris

    Eris

    A NodeJS Discord library

    A Node.js wrapper for interfacing with Discord. You will need NodeJS 10.4+. If you need voice support you will also need Python 2.7 and a C++ compiler. Create a directory for your bot, and change to that directory in your command line. If you want to be more updated (at the expense of stability), you can install the beta builds instead. Eris supports a few optional libraries that could potentially improve bot performance but may require additional dependencies. If you want Eris to use any of these packages, install them in the same directory as Eris, and Eris will automatically use them. You can find more examples on the GitHub repo. The rest of the docs will help you with using the various functions of the library. Have fun!
    Downloads: 0 This Week
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  • 13
    EventEmitter3

    EventEmitter3

    Because there's also a number 2. And we're faster

    EventEmitter3 is a high-performance event emitter for Node.js and the browser, providing a lightweight and efficient solution for managing events and event listeners in JavaScript applications.
    Downloads: 0 This Week
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  • 14
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  • 15
    Execution Work, it´s a new framework engine for php programming. Ew supports OOP, MVC, XML, XSL, DataBase2Objects, and much more. Ew has its own Business Components, with many "packages" to make your programming life simple and useful.
    Downloads: 0 This Week
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  • 16
    Exifr

    Exifr

    The fastest and most versatile JS EXIF reading library

    Exifr is a fast and very versatile JavaScript EXIF reading library that works everywhere, parses everything and handles just about anything you throw at it. It can handle any input: buffers, url, <img> tag and more; .jpg, .tif, and .heic files; and TIFF (EXIF, GPS, etc.), XMP, ICC, IPTC, JFIF segments. It skips parsing tags you don’t need, and reads only the first few bytes. There’s no need to read the whole file to see if there’s an EXIF file in it, or extract all the data when you just need a few tags. Instead of reading byte by byte from start to finish, Exifr jumps through the file structure from pointer to pointer, making it extremely fast and efficient!
    Downloads: 0 This Week
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  • 17
    Express ES2017 REST API Boilerplate

    Express ES2017 REST API Boilerplate

    Express starter for building RESTful APIs

    A boilerplate for building RESTful APIs with Node.js and Express, providing a pre-configured structure for efficient backend development.
    Downloads: 0 This Week
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  • 18
    F JavaScript Library is a collection of useful small javascripts.
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  • 19
    FArP is JavaScript function arguments processor. It provides an easy way to parse function input arguments against expected types and values. Thanks to it developers can avoid chains of if conditions at the beginnings of their functions.
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  • 20

    FCKEditor plugins

    The plugins for FCKEditor you cant find online

    The idea with the project is to develop all those plugins for FCKEditor that cant usually be found on internet. Size doesn't matter!
    Downloads: 0 This Week
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  • 21
    FKit

    FKit

    A functional programming toolkit for JavaScript

    FKit (pronounced eff-kit) is a functional programming toolkit for JavaScript. It provides many functions for solving common problems with functions, objects, arrays, and strings. It aims to provide reusable building blocks while maintaining a laser focus on everyday utility.
    Downloads: 0 This Week
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  • 22
    Web gallery based on pre-generated metadata, typically according to directory structure, not database or an administration. Development moved to: http://github.com/martinkozak/fsgal.
    Downloads: 0 This Week
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  • 23
    FSVS

    FSVS

    Full Screen Vertical Scroll

    Simple full-screen vertical slider using CSS3 transitions followed up by a jQuery fallback. Bound events support the mouse wheel, click and drag, arrow keys, and touch gestures.
    Downloads: 0 This Week
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  • 24
    Facebox

    Facebox

    Facebook-style lightbox, built in jQuery

    Facebox is a jQuery-based lightbox plugin designed to display content in a modal overlay on top of a webpage. It allows developers to present images, HTML content, or remote data in a visually appealing popup without navigating away from the current page. The plugin is inspired by early lightbox implementations and focuses on simplicity and ease of integration into existing web projects. It provides a clean user experience by dimming the background and highlighting the modal content, drawing attention to the displayed information. Facebox supports loading content via AJAX, making it useful for dynamic applications where content is fetched on demand. It also includes basic styling and animation effects to enhance usability and presentation.
    Downloads: 0 This Week
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  • 25
    FancyGrid

    FancyGrid

    JavaScript grid library with charts integration & server communication

    JavaScript grid library with charts integration and server communication. Massive number of features, Paging, Sorting, Filtering, Validation, Ajax data, Files data, RESTful, flexible CRUD, Integration with charts, Form module, Theming, Touch Support, and others. FancyGrid is integrated(data binding) with chart libraries, HighCharts, and sparklines. Intelligent modules system auto-detects and loads needed modules. Good Documentation, Elegant API, Number of Samples, and Professional Support.
    Downloads: 0 This Week
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