Open Source JavaScript Libraries - Page 14
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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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JSDo5an is simple JavaScript library for validating user input. All you have to do is to specify the validation rules.Documentation, tutorials on how to use the API can be found at http://www.khaledinho.com/main/?page_id=43
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JSNAV - a library that allows to specify and save some javascript calls in the page's URI. This library helps to standardize the coding javascript URI handler in the anchors. Also it helps to keep the classic navigation anchors.
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JSVerbalExpressions
JavaScript Regular expressions made easy
VerbalExpressions is a JavaScript library that helps to construct difficult regular expressions. Methods have a return type of VerbalExpression except where mentioned otherwise. If there is no mention of a method’s parameters, it is to be assumed that it has none. VerEx is the function that is exported from within VerbalExpressions.js and is to be the first method in chains that describe verbal expressions. Construct and return a new instance of VerbalExpression. Used to support the new VerbalExpression() syntax in ES6 classes as mandated by the spec. You usually wouldn’t need to call VerEx().constructor(). This method will not be accessible from outside the source file since VerEx() returns an instance of the class rather than the class itself. sanitize is a static method on the VerbalExpression class. However, it is also exposed as VerEx().sanitize. Enabling control multi-line matching would cause the expression to not look for matches beyond the first line. -
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JScriptTouch is an SDK which allows developers quickly create full featured applications for iPhone platform using javascript.
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You want to develop a javascript game or make your webpages dynamic. This project creates freely available javascript interfaces such as one to help you create board games, one that contains several animations for images, ... Programmers, enjoy!
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JavaScript & Node.js Testing
Comprehensive and exhaustive JavaScript & Node.js testing
This project compiles practical advice for testing JavaScript applications across the stack, emphasizing clarity, speed, and reliability over dogma. It distinguishes between different kinds of tests—unit, integration, end-to-end—and shows when each is appropriate given time and risk constraints. The guide focuses on removing flakiness by isolating side effects, controlling randomness, and stabilizing async code paths. It also demonstrates test design techniques like arranging test data, using expressive assertions, and structuring test suites for readability and discoverability. Tooling agnosticism is a theme: patterns are illustrated with popular tools but written to survive framework churn. The end goal is a test suite that acts as living documentation while catching regressions quickly and deterministically. -
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JavaScript Algo and Data Structures
Algorithms and data structures implemented in JavaScript
javascript-algorithms is an open source repository by Oleksii Trekhleb that provides implementations of algorithms and data structures in JavaScript. Each algorithm includes explanations, complexity analysis, and references for further reading, making it both a coding resource and a study guide. The repository covers topics such as sorting, searching, graph algorithms, cryptography, and data structures like linked lists, stacks, and queues. It is designed to help developers understand algorithm fundamentals and practice problem-solving with JavaScript. Multilingual README files make the resource accessible to a global audience. With strong community engagement, it is one of the most popular algorithm repositories on GitHub. -
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JavaScript Array Explorer
A resource to figure out what JavaScript array method would be best
Array Explorer is an educational web-based resource created by Sarah Drasner to help developers understand and select the appropriate JavaScript array method (like map, filter, reduce, find, etc.) when they’re stuck wondering “which one should I use?” Instead of diving into endless docs, you can use the interactive tool to specify what you’re trying to accomplish—e.g., “remove items,” “transform items,” “find something,” “aggregate results”—then see which methods match and get live code examples. The tool provides visual examples, explanations of method semantics, and code snippets you can copy into your own project. Because many JavaScript learners struggle with which array method to choose or misuse them, this resource offers an approachable way to learn by doing and exploring rather than memorizing. The front-end is friendly and responsive, with filtering UI that lets you narrow based on the kind of task you’re performing. -
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JavaScript Load Image
Load images provided as File or Blob objects or via URL
JavaScript-Load-Image is a client-side image loading and processing library that focuses on turning File/Blob objects or remote URLs into HTML <img> or <canvas> elements, optionally transformed in the process. It is often used in upload flows where images need to be previewed, resized, rotated, or cropped before being sent to a server, reducing bandwidth and improving user experience. The library can interpret image metadata, including Exif and IPTC tags, and can extract embedded thumbnails when present, which is handy for building fast image pickers or galleries. One of its key capabilities is correcting Exif Orientation, so photos taken on mobile devices appear upright without additional server-side processing. It also offers the option to preserve or restore image headers when resizing, which helps retain metadata or orientation information in the re-encoded image. -
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Javascript CRT
Cross browser Javascript library that provides old style text mode
Cross browser Javascript library that provides old style text mode -
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Javascript Moony Parser
library: parsing text by given grammar in javascript
This is a javascript library for parsing texts. The library accepts minimalistic moony grammar language and parses given text by the grammar. It is an implementation of "Earley" parser which makes it context free grammar complete. Instructions are bundled in download. -
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Jspreadsheet CE
Javascript plugin to create web-based tables & spreadsheets
Jspreadsheet CE is a lightweight Vanilla JavaScript data grid plugin to create amazing web-based interactive HTML tables, and spreadsheets compatible data grid with other spreadsheet software. You can create an online spreadsheet table from a JS array, JSON, CSV or XSLX files. You can copy from excel and paste straight to your Jspreadsheet CE spreadsheet and vice versa. It is very easy to integrate any third party JavaScript plugins to create your own custom columns, custom editors, and customize any feature into your application. Jspreadsheet CE has plenty of different input options through its native column types to cover the most common web-based application requirements. It is a complete solution for web data management. Create amazing applications with Jspreadsheet CE JavaScript spreadsheet. -
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Jupyter Nbextensions Configurator
A jupyter notebook serverextension providing config interfaces
A server extension for jupyter notebook which provides configuration interfaces for notebook extensions (nbextensions). The jupyter_nbextensions_configurator jupyter server extension provides graphical user interfaces for configuring which nbextensions are enabled (load automatically for every notebook). In addition, for nbextensions which include an appropriate yaml descriptor file (see below), the interface also renders their markdown readme files, and provides controls to configure the nbextensions' options. -
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Keen UI
A lightweight Vue.js UI library with a simple API
Keen UI is a Vue.js UI library with a simple API, inspired by Google's Material Design. Keen UI is not a CSS framework. Therefore, it doesn't include styles for a grid system, typography, etc. Instead, the focus is on interactive components that require Javascript. You should be able to use Keen UI with any page layout, structure, or CSS framework. -
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Knwl.js
A .js library for parsing text for specific information
Knwl.js is a Javascript library that parses through text for dates, times, phone numbers, emails, places, and more. Parser plugins are what make Knwl.js tick and give it new parsing abilities. There are many already available under ./default_plugins for a number of tasks. If you're interested in developing plugins for Knwl.js, ./plugin_development.md is a great place to start. You can optionally specify a language in the first parameter. This helps plugins identify and better suit particular languages. A packaged version of Knwl.js for the browser with default plugins is available in the ./dist directory. What's awesome about the new version of Knwl.js is that it makes it much easier for anyone with a little knowledge of JS to build plugins. These plugins offer new parsing abilities for Knwl.js that otherwise wouldn't exist. -
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Krajee bootstrap-star-rating
A simple yet powerful JQuery star rating plugin with fractional rating
A simple yet powerful JQuery star rating plugin for Bootstrap that supports advanced features like fractional star fill and RTL input support. Developed with a focus on utilizing pure CSS-3 styling to render the control. The plugin uses Bootstrap markup and styling by default, but it can be overridden with any other CSS markup. Ability to size the rating control to any size including the stars, caption, and clear button. Five prebuilt size templates are available xl, lg, md, sm, and xs. However one can have their own size configured through a simple CSS manipulation. You can use the HTML 5 number input for polyfill and the plugin will automatically use the number attributes like min, max, and step. However, number inputs have a problem with decimal values on the Chrome Browser. Specifically uses Bootstrap 3.x styles & glyphs. Can be combined to work better for Bootstrap-styled projects (or input group addons). -
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LABjs
Loading And Blocking JavaScript
LABjs is a lightweight JavaScript loader focused on speeding up page performance by controlling how and when scripts download and execute. It provides an expressive API to load multiple files in parallel while guaranteeing execution order, so dependent scripts don’t break. By decoupling fetch from execute, it avoids the blocking behavior of traditional tags and helps reduce perceived load time. LABjs embraces a “load groups, then wait” model that makes dependency management clear without a separate build step. It’s designed to work across a wide range of browsers, including older ones, which is why it relies on robust feature detection and time-tested loading techniques. The library is intentionally small and framework-agnostic, so it can be dropped into almost any stack to orchestrate client-side assets more predictably. -
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LaTeX.CSS
LaTeX.css is a library that makes your website look like a LaTeX doc
This almost class-less CSS library turns your HTML document into a website that looks like a LATEX document. Write semantic HTML, and you are good to go. The source code can be found on GitHub. LaTeX.css is a minimal, almost class-less CSS library that makes any website look like a LaTeX document. Add any optional classes to elements with special styles (author subtitle, abstract, lemmas, theorems, etc.). The labels of theorems, definitions, lemmas and proofs can be changed to other supported languages by including the snippet provided in addition to the main CSS file. Sidenotes can be used as an alternative to footnotes, where the user does not have to jump to the bottom of the page to read it. On mobile, click the superscript to reveal the note. Add a class of left to the span with the sidenote class to make the note appear on the left side of the page on instead of right. -
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Laravel QuestionAnswer
Vote based Question & Answer site built using Laravel 5.4
Vote-based Question and answer site built using Laravel 5.4, material design, x-editable, jQuery Upvote, and email/database notifications. Registered users can submit questions, answer questions, vote on questions & answers, and when an answer is posted to a question the author is notified via email. Users will also be notified about votes, but only viewable in their profile. -
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Layui UI
An open source Web UI component library
layui is a set of open-source Web UI component library, which adopts its own classic modularization specifications and follows the development method of native HTML/CSS/JS. It is very easy to use and ready to use. Its style is simple and light, while its components are elegant and rich. Every detail from source code to usage method has been carefully crafted, which is very suitable for the rapid development of web interface. Layui is different from those front-end frameworks based on the bottom layer of MVVM, but it does not go against the road, but believes in returning to the basics. To be precise, it is more for back-end developers. You don’t need to get involved in various front-end tools. You only need to face the browser itself, and let all the elements and interactions you need come from here at your fingertips. -
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Learning Prompt
Free prompt engineering online course
Learning-Prompt is a curated repository of prompts, techniques, and instructional patterns designed to help people construct better prompts for AI systems, including generation, reasoning, and debugging tasks. It collects examples of effective prompt formats, chains of thought, strategy scaffolds, and comparative methods that help yield consistent, high-quality results. The project also includes meta-guidance: reflections on prompt failures, tips for prompt tuning, ways to mitigate model bias or misinterpretation, and how to adapt prompts for different AI capabilities. Because prompt design is a skill under continuous iteration, the repo encourages contributions of new prompt recipes, evaluations, and domain-specific adaptations. It’s intended for educators, developers, and prompt engineers who want a living toolkit rather than static advice. Over time it serves as both a reference and playground for emergent prompt techniques.
