Open Source JavaScript Libraries - Page 25
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JavaScript Libraries
View 77 business solutionsBrowse 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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ezUser is a simple framework for adding user authentication and registration to your PHP website. Simply include ezUser.php in your project and a single line of code will enable your site to accept user registrations and logins. That's it!
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fastq
Fast, in memory work queue
fastq is a high-performance in-memory work queue for JavaScript and Node.js applications. It runs tasks through a worker function while enforcing a configurable concurrency limit. Both traditional callback workers and Promise-based async workers are supported. Tasks can be added to either the front or back of the queue depending on scheduling needs. Processing can be paused, resumed, emptied, or terminated while exposing the current queue length and idle state. Hooks report conditions such as drain, saturation, empty queues, and task errors. TypeScript definitions are included, and the package is designed to provide queue management with very little performance overhead. -
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fe-advanced-interview
A Guide to Advanced Front-End Interviews
fe-advanced-interview is a comprehensive front-end engineering interview preparation repository focused on advanced web development concepts, system design, and real-world technical problem solving. The project compiles high-level interview questions and explanations covering JavaScript internals, browser rendering, networking, performance optimization, frameworks, architecture, and engineering best practices. Unlike beginner-focused interview guides, it emphasizes deeper understanding of how front-end technologies work internally and how large-scale applications are designed and maintained. The repository is structured as a learning resource for experienced developers preparing for senior engineering interviews at major technology companies. It combines theoretical explanations with practical examples, helping users strengthen both conceptual understanding and applied engineering skills. -
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frontend-mentor-challenges
My submissions for the Frontend Mentor Challenges
The frontend-mentor-challenges repository contains the author’s submissions to the platform Frontend Mentor — which offers structured UI/UX layout challenges (landing pages, components, form designs) for front-end developers. The codebase shows solutions in HTML, CSS, Javascript, with each challenge typically including an original design file plus the author’s implementation. It’s a great way to practice responsive layouts, CSS grid/flexbox mastery, UI refinement, and build portfolio-worthy front-end snapshots. The README shows that the author has live demos and even a YouTube playlist of walkthroughs. This sort of repository is useful for demonstrating front-end craftsmanship, CSS/HTML mastery, and attention to design detail. It also helps reinforce iteration on design challenges and small reusable components. -
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gChartToolPHP
A PHP Wrapper for the Google Chart Tool Class
gChartToolPHP provides a simple, comprehensive wrapper to easily produce Google client-side charts. graphs and tables using only PHP code, and embed them in your own pages. It provides support for all the current Google chart formats including the more complex charts such as bubbles, gauges and scatter charts. In addition, a Google Toolbar can be added to the chart to allow easy export of the data Data can be supplied to the chart in the following ways: 1. Static data sets embedded in the page 2. Dynamically created PHP array data 3. An AJAX call to a Server program 4. A Google Spreadsheet -
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GetHTTP is a very easy to use ajax library. it basicly consists of two functions syncHTTP and asyncHTTP. The goal of the project is to make ajax available to anyone, without any knowladge of the XMLHttpRequest object.
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gitmoji
An emoji guide for your commit messages
Gitmoji is an initiative to standardize and explain the use of emojis on GitHub commit messages. Gitmoji is an emoji guide for GitHub commit messages. Aims to be a standarization cheatsheet, guide for using emojis on GitHub's commit messages. Using emojis on commit messages provides an easy way of identifying the purpose or intention of a commit with only looking at the emojis used. As there are a lot of different emojis I found the need of creating a guide that can help to use emojis easier. This project is Open Source, that means everyone can participate, suggesting, discussing and adding new emojis. Take a look at the contributing section and guidelines for contributing. An easy solution for using gitmoji from your command line, is to install gitmoji-cli. A gitmoji interactive client for using emojis on commit messages. This project is a static website built with Next.js. All the gitmojis displayed are rendered from a JSON file. -
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glfx.js
An image effects library for JavaScript using WebGL
glfx.js is a JavaScript image-effects library that uses WebGL to apply real-time filters and transformations directly in the browser. It exposes a simple API where images are uploaded into GPU textures, processed with shader-based filters, and rendered to a WebGL canvas. Because the work is done on the GPU, many effects that would be too slow in pure JavaScript (like complex blurs, lens effects, or tilt-shift) can run interactively, even on large images. The library is structured around three components: textures (image sources), filters (shader pipelines), and canvases (render targets), making it easy to compose multiple effects. A demo page showcases a variety of filters, from basic brightness/contrast adjustments to more advanced distortions and color manipulations. glfx.js remains a handy reference and solution for anyone needing client-side photo editing, visual effects, or generative graphics powered by WebGL. -
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gray
Make an image grayscale in all browsers
Make an image gray in all browsers. CSS Styles and jQuery plugin to display images in grayscale. -
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gray-matter
Smarter YAML front matter parser
gray-matter is a JavaScript library for parsing front matter from strings or files. It is commonly used in static site generators, documentation systems, content pipelines, and Markdown-based publishing tools. The library parses YAML front matter by default, but it can also work with JSON, TOML, CoffeeScript-style front matter, and custom parsers. It returns the content body and extracted metadata as a structured object that applications can process easily. Its parser is designed to be faster and more reliable than simple regular-expression approaches, especially around edge cases. It is useful whenever developers need clean metadata extraction from Markdown, HTML, or other text-based content files. -
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gremlins.js
Monkey testing library for web apps and Node.js
Gremlins.js is an open-source monkey testing library written in JavaScript. It unleashes a horde of undisciplined gremlins on a web app in order to check its robustness. We've modernized the code of Gremlins.js, our monkey testing library for frontend apps. It's now super easy to detect memory leaks in your JavaScript code. Gremlins.js comes with 5 types of undisciplined gremlins that will try to break your web application: the clicker, the form filler, the scroller, the typer and the toucher. You can also add custom gremlins easily. While gremlins try their best to destroy your app, another type of scripts called mogwais monitor the console errors and the number of frames by second to detect performance problems. Every action performed by the gremlins, and all the errors that might occur, are all logged! In version 2.0, we now use npm to publish the library and unpkg to serve it! -
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HTML5 canvas chart library (javascript) . Display and animate charts & graph in HTML5 Canvas. Signal,pie,ring,led,digital,odometer, radial and lineal meters, thermometer and vumeter,piramid,funnel,stack and Multiserie charts availables
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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. -
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hello.js
API library for connecting with OAuth2 services
A client-side JavaScript SDK for authenticating with OAuth2 (and OAuth1 with an OAuth proxy) web services and querying their REST APIs. HelloJS standardizes paths and responses to common APIs like Google Data Services, Facebook Graph and Windows Live Connect. It’s modular, so that list is growing. No more spaghetti code! Compiled source, which combines all of the modules, can be obtained from GitHub, and source files can be found in Source. The Bower package shall install the aforementioned "/src" and "/dist" directories. The "/src" directory provides individual modules which can be packaged as desired. If a network string is provided: A consent window to authenticate with that network will be initiated. Else if no network is provided a prompt to select one of the networks will open. A callback will be executed if the user authenticates and or cancels the authentication flow. -
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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! -
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hummingbird
The most sensible component system for Tailwind.
Hummingbird is a component system for Tailwind developers who care about architectural discipline. It ensures global design control with local utility flexibility. Hummingbird is a lightweight, framework-agnostic tool that integrates seamlessly with modern stacks and helps build scalable, maintainable web applications without extra weight. -
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i18n-locales
List of locales for i18n
List of locales for i18n. -
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iCSS
More than CSS
iCSS is a large curated repository of advanced CSS techniques, creative experiments, and deep dives into modern web animation and styling capabilities. Rather than being a traditional library, the project functions as an educational and inspirational knowledge base that explores unusual, powerful, or overlooked CSS features. The content covers topics such as layout tricks, animation patterns, visual effects, accessibility considerations, and emerging CSS standards. Materials are continuously updated and organized by category, helping frontend developers discover new approaches to solving UI and visual design challenges. The repository aims to broaden developers’ thinking about what can be achieved purely with CSS and native browser capabilities. Overall, iCSS serves as a high-value reference and inspiration hub for frontend engineers seeking to push the boundaries of modern CSS. -
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iView Weapp
A set of high-quality WeChat applet UI component library
Use WeChat to scan and experience the example of small program components. Before you start using iView Weapp, you need to read the micro-channel applet custom components related documents. We have built-in examples of all components, you can scan the small program code experience on the right, or view it in WeChat developer tools. Then, the examplesdirectory can be opened in the micro-channel developer tools. We adopted a 24-grid system to divide the area into 24 equal parts, which can easily deal with most layout problems. Using the grid system for web page layout can make the page layout beautiful and comfortable. The grid contains 4 components: i-grid, i-grid-item, i-grid-icon, i-grid-label, among them, i-grid-icon and i-grid-label have customized styles by default, but These two components can also be eliminated in development. -
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image-to-ascii
A Node.js module that converts images to ASCII art
image-to-ascii is a Node.js module that converts raster images into character-based terminal artwork. Input can come from a local file, remote URL, or in-memory Buffer. The converter maps pixel brightness to a configurable sequence of ASCII characters. It can preserve the original colors through ANSI foreground or background styles or generate plain monochrome output. Options control width, height, screen fitting, aspect ratio, transparency, reversed brightness, and custom background colors. Developers can receive a final string or work with the underlying pixel matrix through custom processing functions. A companion command-line package and webcam example provide additional ways to use the conversion engine. -
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interview-ouch
Simple web snippets for interviews
interview-ouch is a cheeky, realistic collection of tough interview questions and scenarios that tend to “hurt” unprepared candidates. It’s meant to expose the gaps in typical interview prep by highlighting non-trivial, edge-case, or context-heavy questions. The repo covers programming, systems, and sometimes softer judgment questions that interviewers use to see how you think under pressure. Instead of focusing only on textbook algorithms, it nudges you toward understanding trade-offs, code quality, debugging, and real-world constraints. This makes it a good practice tool for senior or experienced candidates who won’t be impressed by just LeetCode-style prompts. It’s also helpful for interviewers who want to refresh their own question bank with more challenging material. -
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Javascript library assisting in measuring the IP protocol webclients are using (IPv4, IPv6) and assessing broken webclients when websites go dual stack.
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ipynb-quicklook
Generator for Jupyter/IPython notebooks without further dependencies
A Quick Look generator for Jupyter/IPython notebooks without further dependencies. This plugin has now been integrated into a native macOS app, Jupyter Notebook Viewer. This is the recommended way to install the QuickLook generator. A stand-alone Quick Look generator for Jupyter/IPython notebooks on macOS. Contents are rendered on-the-fly using nbviewer.js. -
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ismp
This project has moved to github
This project has moved to github -
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isomerjs
Simple isometric graphics library for HTML5 canvas
Isomer is a lightweight JavaScript library for drawing isometric scenes on an HTML5 canvas. It provides abstractions for points, vectors, paths, shapes, colors, and the complete rendering surface. Built-in shape helpers create prisms, pyramids, and cylinders, while extrusion turns two-dimensional paths into three-dimensional objects. Shapes can be translated, scaled, or rotated around the X, Y, and Z axes. The renderer orders surfaces by depth to reduce visual overlap problems when drawing complex scenes. Developers can combine custom paths and colors to construct buildings, diagrams, game graphics, and procedural illustrations. The library can be added directly through a script file and requires no dedicated 3D rendering engine.
