Open Source JavaScript Libraries - Page 18
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JavaScript Libraries
View 75 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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Go From AI Idea to AI App FastAccess Gemini 3 and 200+ models. Build chatbots, agents, or custom models with built-in monitoring and scaling.
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Auth0 B2B Essentials: SSO, MFA, and RBAC Built InAuth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.
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Source Map Support
Adds source map support to node.js (for stack traces)
Source Map Support is a Node.js module that enhances stack traces for transpiled or bundled JavaScript by resolving them back to the original source files using source maps. When code is compiled from TypeScript, CoffeeScript, Babel, or bundlers like Webpack, errors normally point to the generated code; this module intercepts V8’s stack trace API and remaps paths and line numbers to their original locations. The output closely mimics Node’s native stack format, so it feels like standard stack traces—but with your original source filenames and line numbers instead of opaque build artifacts. It’s designed to be easy to enable: you can require it programmatically or load it via a register hook so that all subsequent errors benefit. Because it relies on the source-map library, it works across a wide range of build systems that emit standard source maps. -
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Speedy Composer
Speedy Composer – Artificial Neural Network Melody Composer.
Thank you for your interest in Speedy Composer. Speedy Composer is an automated application for composing melodies for Speedy Net members. We recently made changes to the source code of Speedy Net, and converted it into the Python language and Django framework. Since Speedy Composer was originally written in PHP, it is not adapted to work with Speedy Net in its current form. So unfortunately we were forced to temporarily close the app Speedy Composer. But don't worry, we kept backups of all the tunes composed by Speedy Composer, and when the website is reopened we will upload them to the new site. Speedy Composer and Speedy Net are open source applications, free software. We are currently looking for volunteers to help us convert Speedy Composer to Python. If you are interested in volunteering, please contact me by email. Thank you and good luck, Uri Rodberg Founder and Director of Speedy Net and Speedy Composer, Speedy Paz Technologies Ltd. uri@speedy.net -
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State Transition Plugin for Phaser
State transition plugin for Phaser.js
Phaser State Transition is a plugin that facilitates smooth transitions between game states in Phaser. It allows developers to define custom animations and easing functions when switching scenes, enhancing the visual flow of games. -
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StatechartJS
Statechart implementation in JavaScript.
Hierarchical state machines implementation in JavaScript heavily inspired by the QP active object framework, see http://www.state-machine.com/. See the README file for details. The implementation is JavaScript engine agnostic and works both in browsers and in NodeJS. -
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Sticky Sidebar
Pure JavaScript tool for making smart and high performance bar
Sticky Sidebar ⬆⬇ is a pure JavaScript plugin for making smart and high-performance sticky sidebar, works with the sidebar if it’s taller or shorter than the viewport, is integrated with a resize sensor to re-calculate the dimensions automatically when the size of the sidebar or its container is changed, supports jQuery/Zepto and compatible with Firefox, Chrome, Safari, and IE9+. The source can be found on GitHub. -
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Subspace
Library for Reactive Dapp Development with auto syncing
Subspace is a framework agnostic JS library that embraces reactive programming with RxJS, by observing asynchronous changes in Smart Contracts, and providing methods to track and subscribe to events, changes to the state of contracts and address balances, and react to these changes and events via observables. Subspace also takes care of syncing under the hood, saving & loading the state in a local database. Methods are provided to track and subscribe to events, contract & state balances, and react to changes via observables. No matter your favorite JS framework, you can use Subspace to simplify your development process. It works with React or Angular in the browser, and of course plays well with nodejs. Subspace saves state to a local database ensuring your dApp always syncs from the last known point, even after reload. -
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Substance.js
A JavaScript library for web-based content editing
A JavaScript library for web-based content editing. Substance is a JavaScript library for web-based content editing. It provides building blocks for realizing custom text editors and a web-based publishing systems. It is developed to power our online editing platform Substance. The test suite is rebuilt as you make changes to the source files. -
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Sugar
A Javascript library for working with native objects
A straightforward API makes Sugar very easy to pick up and start using. Custom builds and modularized npm packages let you use only what you need. Users can define methods or use plugins to handle specialized use cases. The date module parses, formats, and manipulates dates and supports many locales. Sugar blends in with native methods, and defers to their implementations when possible. A comprehensive polyfill suite patches browser support when it is broken or missing. As of v2.0, native extension has become opt-in while supporting two new ways of interacting with the library. Sugar still believes in the safe extension of natives, however there are times when this is not appropriate, and this choice is now put in the hands of the user. Custom browser builds can be created on the site download page. In addition, tools like Browserify can also be used to create custom builds, as npm packages are now fully modular. -
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Sulla
Javascript Whatsapp API library for chatbots
Sulla is a javascript library that provides a high-level API control to Whatsapp so it can be configured to automatize responses or any data that goes through Whatsapp effortlessly. As of version 2.3.5 it seems that sulla has reached a very rich and stable functionality and architecture. As much as I would love to, I cannot dedicate a lot of time to this project so please consider checking out forked versions of sulla where other developers can dedicate more time and support to it. After executing create() function, sulla will create an instance of WhatsApp web. If you are not logged in, it will print a QR code in the terminal. Scan it with your phone and you are ready to go! Sulla will remember the session so there is no need to authenticate every time. By default QR code will appear on the terminal. The decryption is being done as fast as possible (outruns native methods). Supports big files! -
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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SuperAgent
Ajax for Node.js and browsers (JS HTTP client)
SuperAgent is light-weight progressive ajax API crafted for flexibility, readability, and a low learning curve after being frustrated with many of the existing request APIs. It also works with Node.js! Small progressive client-side HTTP request library, and Node.js module with the same API, supporting many high-level HTTP client features. Browser-ready versions of this module are available via jsdelivr, unpkg, and also in the node_modules/superagent/dist folder in downloads of the superagent package. If you are using browserify, webpack, rollup, or another bundler, then you can follow the same usage as Node. SuperAgent is easily extended via plugins. The Node client supports making requests to Unix Domain Sockets. DELETE, HEAD, PATCH, POST, and PUT requests can also be used, simply change the method name. Absolute URLs can be used. In web browsers absolute URLs work only if the server implements CORS. -
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SuperTest
Super-agent driven library for testing node.js HTTP servers
A super-agent driven library for testing node.js HTTP servers using a fluent API. The motivation with this module is to provide a high-level abstraction for testing HTTP, while still allowing you to drop down to the lower-level API provided by superagent. Install SuperTest as an npm module and save it to your package.json file as a development dependency. You may pass an http.Server, or a Function to request(), if the server is not already listening for connections then it is bound to an ephemeral port for you so there is no need to keep track of ports. One thing to note, is that superagent now sends any HTTP error (anything other than a 2XX response code) to the callback as the first argument if you do not add a status code expect (i.e. .expect(302)). Expectations are run in the order of definition. This characteristic can be used to modify the response body or headers before executing an assertion. -
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Superfine
Absolutely minimal view layer for building web interfaces
Superfine is a minimal view layer for building web interfaces. Think Hyperapp without the framework—no state machines, effects, or subscriptions, just the absolute bare minimum (1 kB minified+gzipped). Mix it with your favorite state management library or use it standalone for maximum flexibility. When describing how a page looks in Superfine, we don't write markup. Instead, we use the h() and text() functions to create a lightweight representation of the DOM (or virtual DOM for short), and patch() to actually render the DOM. Superfine won't re-create the entire DOM every time we use patch(). By comparing the old and new virtual DOM we are able to change only the parts of the DOM that need to change instead of rendering everything from scratch. -
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Svelte forms lib
A lightweight library for managing forms in Svelte
Svelte Forms lib is a Formik-inspired library for building forms easily in a Svelte project. When building modern web applications forms often play a big part in it. We use forms to log in, place orders, book flights and perform other data-entry tasks. In developing a form, it's important to create a flow that guides the user efficiently and effectively through the workflow. This library helps you build forms by exposing an easy API for form creation, validation and submission. -
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Swagger Injector
Delivering swagger docs through Node middleware
Adaptation of swagger UI to render the swagger view of a server's swagger documentation for a specified route. -
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SweetModal
The sweetest library to happen to modals.
The sweetest library to happen to modals, is now available for Vue.js. -
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Swing
A swipeable cards interface
Swing is a JavaScript library designed to create realistic swipeable card interfaces similar to those popularized by dating applications. It provides physics-based animations that simulate natural movement when users drag and release cards, enhancing user interaction and engagement. The library allows developers to build interfaces where elements can be swiped left, right, or in other directions, triggering specific actions. It is highly customizable, enabling control over thresholds, directions, and animation behavior. Swing is lightweight and framework-agnostic, making it easy to integrate into different web projects without heavy dependencies. It is commonly used for building interactive UI components such as recommendation systems or decision-based interfaces. Overall, swing offers a simple yet powerful way to implement gesture-driven interactions in web applications. -
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SwirlJS
Javascript GUI library with focus on simplicity.
SwirlJS is a javascript GUI library and theme with focus on simplicity and ease of use. Made for web developers who want to be productive. Most javascript libraries offer more functionality but are most times overcomplicated. SwirlJS makes it easy to add basic user interaction to your web pages. -
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Synaptic
Architecture-free neural network library for node.js and the browser
Synaptic is a javascript neural network library for node.js and the browser, its generalized algorithm is architecture-free, so you can build and train basically any type of first order or even second order neural network architectures. This library includes a few built-in architectures like multilayer perceptrons, multilayer long-short term memory networks (LSTM), liquid state machines or Hopfield networks, and a trainer capable of training any given network, which includes built-in training tasks/tests like solving an XOR, completing a Distracted Sequence Recall task or an Embedded Reber Grammar test, so you can easily test and compare the performance of different architectures. If you have no prior knowledge about Neural Networks, you should start by reading the provided guide. -
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THANKS
Give thanks to the open source maintainers you depend on
THANKS is a small command-line tool that helps developers discover which open-source maintainers behind their npm dependencies are accepting donations. It is built around a simple idea: projects benefit from countless unpaid maintainer hours, so users should have an easy way to support the people who keep those projects alive. Instead of forcing teams to research every dependency manually, thanks scans the current project and surfaces donation opportunities directly from the terminal. It can be run instantly with npx or installed globally for repeated use across projects. The project also invites maintainers to add themselves to its donation list through pull requests, making it community-driven. It is best suited for JavaScript and Node.js developers who want to make open-source funding more visible and actionable. -
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TW Elements
Huge collection of Tailwind MIT licensed (free) components
TW Elements is a large collection of UI components, templates, and plugins built specifically for Tailwind CSS, designed to extend its functionality with interactive and pre-designed elements. It provides hundreds of ready-to-use components, including forms, buttons, navigation elements, and layout blocks, enabling developers to build complete interfaces quickly. Unlike basic Tailwind utilities, TW Elements adds interactivity through JavaScript-powered components such as modals, dropdowns, and carousels, making it more feature-rich. The library includes a design system called Material Minimal, which combines elements of Material Design with a more refined and modern aesthetic. It supports easy theming and customization using Tailwind’s configuration system, allowing developers to adapt styles to their branding needs. TW Elements can be integrated into various frameworks and environments, including React, Vue, and standard HTML projects, with simple installation methods via npm or CDN. -
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Taiko
A node.js library for testing modern web applications
Taiko is an open-source Node.js library designed to automate modern web browsers and simplify the process of end-to-end testing for web applications. It provides a concise JavaScript API that allows developers to control browsers programmatically and create automated test scripts that simulate real user interactions with websites. The tool was developed by the team behind the Gauge testing framework and focuses on reliability and readability in browser automation workflows. Taiko works with Chromium-based browsers such as Chrome, Microsoft Edge, and Opera, and can also interact with Firefox, enabling developers to test modern web interfaces across multiple environments. The library includes intelligent element selection capabilities that automatically locate elements on the page, reducing the need for fragile CSS selectors or XPath expressions. -
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TenorSpace.js
Neural network 3D visualization framework
TensorSpace is a neural network 3D visualization framework built using TensorFlow.js, Three.js and Tween.js. TensorSpace provides Keras-like APIs to build deep learning layers, load pre-trained models, and generate a 3D visualization in the browser. From TensorSpace, it is intuitive to learn what the model structure is, how the model is trained and how the model predicts the results based on the intermediate information. After preprocessing the model, TensorSpace supports the visualization of pre-trained models from TensorFlow, Keras and TensorFlow.js. TensorSpace is a neural network 3D visualization framework designed for not only showing the basic model structure but also presenting the processes of internal feature abstractions, intermediate data manipulations and final inference generations. By applying TensorSpace API, it is more intuitive to visualize and understand any pre-trained models built by TensorFlow, Keras, TensorFlow.js, etc. -
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Text Typesetting
Concise guide to better typography and formatting practices
Text-Typesetting is a concise guide to better typography and formatting practices for technical writing. It collects rules of spacing, punctuation, emphasis, and layout that improve readability, especially in documents mixing multiple languages or code. The repository focuses on consistent micro-typography—such as when to use non-breaking spaces, how to place punctuation around quotes, and how to format lists and headings. Examples show the before/after impact of small adjustments, making the guidance practical rather than theoretical. Because the recommendations are tooling-agnostic, they apply to Markdown, HTML, slides, and printed PDFs alike. It’s a handy checklist for authors who want cleaner, more professional documents without becoming typography experts. -
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TextTailor.js
jQuery plugin, tailor made text to fill height of the parent element
Tailor-made text to fit your needs! Responsive text to fill the height of the parent element or ellipse it when it doesn't fit. -
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Textillate.js
A jquery plugin for CSS3 text animations
Textillate.js combines some awesome libraries to provide an easy-to-use plugin for applying CSS3 animations to any text. Simply include textillate.js and it's dependencies in your project to start creating unique effects. Textillate.js is built on top of the simple, yet amazingly powerful animate.css and lettering.js libraries.
