Open Source JavaScript Libraries - Page 16
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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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Modern Errors
Handle errors in a simple, stable, consistent way
Handle errors in a simple, stable, consistent way. Exporting and documenting all error classes allows consumers to check them. This also enables sharing error classes between modules. Error properties that are internal or secret can be prefixed. This makes them non-enumerable, which prevents iterating or logging them. -
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Monkberry
Monkberry is a JavaScript library for building web user interfaces
Monkberry is a highly optimized JavaScript library for building web user interfaces, designed to be extremely small, fast, and simple to use. It uses a template-based approach where UI components are written in a custom templating syntax that compiles directly into efficient JavaScript code. Unlike frameworks that rely on a virtual DOM, Monkberry updates only the necessary parts of the actual DOM, resulting in significantly improved performance. Its compiled templates leverage JavaScript engine optimizations to reduce overhead and improve rendering speed. The library is intentionally minimal, with a small footprint of around one kilobyte, making it ideal for performance-critical applications or environments with limited resources. It also includes features like custom tags, source maps, and a straightforward component structure, enabling developers to build modular interfaces without complexity. -
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Morphext
A simple, high-performance and cross-browser jQuery rotating plugin
A simple, high-performance, and cross-browser jQuery rotating / carousel plugin for text phrases powered by Animate.css. A jQuery plugin for creating text-based carousels, rotating small or large pieces of text one after the other, just like a slider does with images. This can be a great tool for displaying catch phrases, mission statements, tag lines, and so on. -
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Multiple Dates Picker for jQuery UI
[Project moved to GitHub]
Extends jQuery UI's datepicker (calendar) allowing multiple dates and range selection and avoidance. -
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Multiple Window 3D Scene
A quick example of how one can "synchronize" a 3d scene
Multiple Window 3D Scene is an open-source JavaScript demonstration that synchronizes an interactive three-dimensional scene across multiple browser windows. Built with Three.js, it uses localStorage to exchange window positions, dimensions, and state information. Each browser window displays a different portion of a shared virtual scene. Moving or resizing windows changes how the graphical objects appear across the desktop. A dedicated window manager tracks newly opened windows and removes closed ones from the shared state. The rendering system continuously updates object positions to maintain visual continuity between windows. Developers can run the demonstration by opening its HTML file in a compatible browser. The project illustrates creative browser window coordination and real-time 3D graphics. -
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MythCore
Myth Framework Core Libraries (part of MythSDP)
MythCore is a PHP framework that allows the developer to use a C# .NET like object oriented programming approach. It provides the essential classes that the MythSDP platform and the MythFramework builds upon. The goal is to create a library that enables the programmer to use a fully object oriented approach that has the "feel" of .NET and Java programming. Our main goal is ease of use and rapid application development. However, performance and small-footprint are some of the main design goals as well. -
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N-chat
Multiplayer chat rooms built with Express + Socket.IO
N-chat is a small educational group-chat application created with Express and Socket.IO. It demonstrates how a Node.js server can maintain real-time connections and broadcast events among browser clients. Users sign in with a display name that is stored in a cookie, and duplicate active names are rejected. The server tracks connected users and announces when someone enters or leaves the room. Messages can be sent publicly to everyone or privately to a selected online user. The browser interface updates the participant list, timestamps messages, and attempts to reconnect after a lost server connection. Because it relies on early Express and Socket.IO releases, the repository is best treated as a legacy learning example rather than a modern chat platform. -
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NG6
An AngularJS Starter repo for AngularJS + ES6 + Webpack
NG6 is a starter project for building single-page applications with AngularJS 1.x, modern ES6 JavaScript, and Webpack as the module bundler. It provides a minimal but opinionated boilerplate that shows best practices for structuring a scalable Angular app using a fully componentized file layout. The project wires together Webpack and Babel to handle ES6 transpilation, asset bundling, and hot reloading during development. Gulp is used as an orchestrator to run Webpack, start a development server, and generate Angular boilerplate via tasks. The repository also includes a complete testing setup using Karma, Mocha, Chai, and Webpack so tests run through the same pipeline as application code. Styles are handled via SASS (node-sass), with each component encouraged to bundle its own styles, templates, and tests for strong locality. Overall, NG6-starter is designed as a “de facto” reference for developers who want to learn and adopt a modern workflow. -
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NOTY
NOTY is a dependency-free notification library
NOTY is a notification library that makes it easy to create alert - success - error - warning - information - confirmation messages as an alternative the standard alert dialog. There are lots of other options in the API to customize the text, animation, buttons, and much more. It also has various callbacks for the buttons, opening closing the notifications, and queue control. Dependency-free notification library that makes it easy to create alert - success - error - warning - information - confirmation messages as an alternative to the standard alert dialog. -
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NVD3
A reusable charting library written in d3.js
This project is an attempt to build re-usable charts and chart components for d3.js without taking away the power that d3.js gives you. This is a very young collection of components, with the goal of keeping these components very customizable, staying away from your standard cookie cutter solutions. Download d3.v3.js. This is the only required library for NVD3. Download the latest nv.d3.js (version 1.8.1). Get the development version, or minified production version. Don’t forget the NVD3 css file! Checkout our examples gallery for how to code your first chart. Our examples should provide you with enough code to start making beautiful charts. Google Chrome is our best supported browser. NVD3 also works in Firefox, Opera, Safari and Internet Explorer 10. NVD3 is currently maintained by a team of frontend software engineers at Novus Partners. -
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Nan.System.Scripts
System-level script objects (JavaScript)
Nan.System.Scripts ver. 1.1.0-alpha The Nan.System.Scripts solution provides helper objects in JavaScript. NOTE: This is an alpha version and the public interfaces may change. CHANGES: v.1.1.0-alpha: finalized cloner/extender, fixed several bugs, extended test coverage. -
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NanoNeuron
NanoNeuron is 7 simple JavaScript functions
Nano-Neuron is a didactic project that reduces the idea of a neuron to a handful of tiny JavaScript functions so learners can see “learning” in action without heavy frameworks. It demonstrates how a scalar input can be linearly transformed with a weight and bias, then adjusted via gradient updates to fit a simple mapping such as Celsius-to-Fahrenheit conversion. The code emphasizes readability over performance, inviting you to step through calculations and watch parameters converge. Because every concept is expressed in a few lines, it’s easy to tinker—change learning rates, swap cost functions, or visualize error curves. The repository bridges the gap between formulae and intuition by making each update transparent and observable. It’s ideal for absolute beginners who want to internalize core ideas before moving on to multi-layer networks and libraries. -
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Neiki's Charts
Lightweight SVG chart Web Component
Neiki's Charts is a lightweight SVG chart library built as a native Web Component. Drop a single script tag into any HTML page and get four chart types — Line, Bar, Pie, and Scatter — with no build step, no framework, and zero dependencies. CSS is bundled automatically, so one file is all you need. The component uses Shadow DOM for style encapsulation and fits cleanly into any project without CSS conflicts. Charts are fully responsive, support light and dark themes with automatic prefers-color-scheme detection, and expose a simple JS API for data and options. Tooltips, legends, animations, and grid lines are all controlled through standard HTML attributes. All rendering is pure SVG — no Canvas — making charts scalable, printable, and inspectable in DevTools. Accessibility is built in with proper ARIA roles, keyboard-navigable legends, and full prefers-reduced-motion support. -
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NiL.JS
JavaScript engine for .NET written in C#
NiL.JS is a JavaScript engine written in C#, capable of executing ECMAScript 6.0 (ES2015) code. It allows embedding JavaScript execution within .NET applications, providing a bridge between C# and JavaScript. -
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NiceScrollbars
Javascript library to create fully css styleable scrollbars
This Javascript library allows you to replace operating system dependent scrollbar elements with something that you can fully style using CSS rules while you still get the standard, usual behaviour on different platforms like desktop computers, smart phones and touch screen based tablets. Library supports <DIV>, <TEXTAREA> and multiple <SELECT> elements. Please visit project website to download the code! -
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Nightmare
A high-level browser automation library
Nightmare is a high-level browser automation library from Segment. The goal is to expose a few simple methods that mimic user actions (like goto, type and click), with an API that feels synchronous for each block of scripting, rather than deeply nested callbacks. It was originally designed for automating tasks across sites that don't have APIs, but is most often used for UI testing and crawling. Segment started with an open source project. Since then, we’ve open sourced hundreds of our repos. We want to continue supporting the community by publishing our code and other developers’ awesome open source projects. We use these open source projects as the foundations of our infrastructure to handle billions of API calls per day and to allow us to rapidly build and test code on the client. -
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NodObjC
The Node.js ⇆ Objective-C bridge
NodObjC is a bidirectional bridge between Node.js and the Objective-C runtime. It lets JavaScript programs load Apple frameworks and call Objective-C classes, methods, constants, structures, and related C functions. BridgeSupport metadata is used to generate framework APIs dynamically, while the Node FFI layer performs runtime calls. Objective-C message passing is represented with JavaScript function-call syntax that preserves multipart selector names. Developers can build Cocoa or iOS interface prototypes while keeping application logic in JavaScript. Because code runs through V8 instead of being compiled into a native executable, changes can be tested without a full rebuild. The project is especially suited to rapid prototyping, scripting Apple APIs, and applications where development flexibility matters more than maximum native performance. -
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Node Argon2
Node.js bindings for Argon2 hashing algorithm
A Node.js library for hashing passwords securely using the Argon2 key derivation function, a modern cryptographic algorithm. -
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Node Crawler
Web Crawler/Spider for NodeJS + server-side jQuery
Most powerful, popular and production crawling/scraping package for Node, happy hacking. -
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Node RDKafka
Node.js bindings for librdkafka
A high-performance Node.js client for Apache Kafka, built on top of librdkafka, providing bindings for efficient Kafka message processing. -
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Node.js Testing Best Practices
Beyond the basics of Node.js testing
This repository narrows the testing lens to Node.js backends, focusing on the challenges of servers, microservices, and cloud-native deployments. It covers API testing, contract testing, and persistence-layer strategies that avoid coupling tests to fragile implementation details. The material explains how to structure tests around process boundaries—HTTP, queues, cron jobs—while keeping fast feedback cycles through selective integration tests and reliable test doubles. It dives into topics like test containers, ephemeral databases, and idempotent fixtures to ensure deterministic runs in CI. Observability is treated as part of testing: logs, metrics, and tracing make failures diagnosable instead of mysterious. By aligning tests with service responsibilities instead of internal modules, the guide helps teams produce suites that reflect real production behavior. -
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NomeJS
Nome is a JavaScript library for location driven sites
Nome (pronounced know me) is a JavaScript library that leverages the power of HTML5 geolocation and location data. This type of data isn't normally exposed within a user session without signing up to multiple services and installing many large database files locally. Nome gives direct access to location and weather data from an exposed JavaScript API allowing you to create context driven websites that deliver information relevant to your audience. With clever thinking nome has the potential to change the way you deliver content to your audience. A bar could show offers for cool drinks if the temperature rose above 25°c; A shop could entice with targeted offers to customers right outside their door. With nome giving access to more information than is currently offered from a standard browser session, you or your clients could be engaging customers in a new way. -
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Notifme SDK
A Node.js library to send all kinds of transactional notifications
A unified messaging API that enables sending notifications via multiple channels such as email, SMS, push, and chat.
