Open-source alternatives to JavaScript30

React is a JavaScript library for building user interfaces based on a component-driven architecture and unidirectional data flow.

This is a video course that teaches JavaScript from scratch, covering fundamentals like variables, functions, scope, closures, and data types through 88+ lessons organized into 15 modules. The course uses a live-coding pedagogy where students code alongside pre-recorded video lessons, with each lesson providing starter and solution files for self-paced practice. The curriculum focuses on browser-native APIs, teaching DOM manipulation, event handling, and data fetching without external frameworks. Students build real-world projects like image galleries, drawing tools, and audio visualizers thr

ContentTools is a JavaScript framework and suite of tools for building visual WYSIWYG editors. It provides a DOM manipulation library for parsing and transforming HTML strings into structured editable regions, alongside a visual document orchestrator that manages element behaviors and state transitions. The framework includes a specialized browser selection manager to ensure consistent caret positioning and text range highlighting across different web browsers. It also features an HTML content validator used to sanitize output and convert third-party media links into valid embed formats. The

This project is a structured JavaScript programming tutorial and web development learning resource. It serves as an educational guide for learning the JavaScript language, ranging from basic syntax to advanced programming concepts. The resource functions as a JavaScript code example library and a technical guide for DOM manipulation. It provides conceptual explanations and runnable code samples to demonstrate how to solve common development tasks and programmatically manage browser elements. The material covers frontend development training, web browser programming, and the implementation of

This project is a reference guide and collection of implementation patterns for replacing legacy libraries with native JavaScript. It provides a vanilla JavaScript reference guide, a modern web API cookbook, and a DOM manipulation cheat sheet to help migrate frontend dependencies to standard browser APIs. The project focuses on mapping library functions to native interfaces for DOM manipulation, network requests, and event handling. It includes a utility pattern library for common tasks such as string cleaning, type checking, and element styling. The covered capabilities include DOM element

This project is a comprehensive knowledge base and study resource designed for mastering technical interviews. It provides structured guides, roadmaps, and curricula focused on data structures, algorithms, system design, and frontend engineering to help candidates prepare for software engineering screenings. The repository distinguishes itself by offering a holistic approach to professional advancement. Beyond technical drills, it includes a career development handbook covering resume optimization, salary benchmarking, and strategic negotiation coaching. It also provides detailed methodologie

FastMCP is a Python framework designed for building servers that expose functions, resources, and prompts to AI models using the Model Context Protocol. It simplifies the development process by automatically deriving tool metadata, input schemas, and documentation directly from Python function signatures and type hints. The framework provides a unified container for managing these components, allowing developers to build modular applications that integrate seamlessly with AI assistants. The project distinguishes itself through its support for interactive, server-defined user interface compone

svg.js is a JavaScript library and toolkit for programmatically creating, modifying, and querying Scalable Vector Graphics in the browser. It functions as a programmable interface and DOM wrapper that allows developers to manipulate vector elements through a standardized API rather than writing raw XML. The library includes a dedicated animation framework for creating fluid motion and visual transitions. This is supported by tools for path morphing and the use of timelines and easing functions to animate vector graphics. The toolkit covers a broad range of capabilities, including geometric t

Sprint is a lightweight DOM manipulation and event handling library. It provides a minimal set of utilities for selecting, modifying, and traversing elements within the browser document object model. The library utilizes a selector engine to isolate specific document nodes using CSS-like patterns and positional indices. It encapsulates raw DOM elements within a wrapper object to provide a consistent API for updating element attributes, styles, and content. The toolset covers browser event management for attaching and detaching interaction handlers, as well as document tree navigation to loca

This project is a comprehensive reference library of runnable code samples and implementation guides for Web APIs, CSS features, and modular web components. It provides a collection of live demonstrations illustrating how to implement browser APIs and programmatic DOM manipulation. The repository includes specialized demonstrations for interacting with device hardware, such as sensors, Bluetooth, USB, and foldable screen posture detection. It also features implementation guides for modern styling capabilities, including advanced layout patterns, custom functions, and painting APIs, alongside

Cash is a lightweight DOM manipulation library and HTML element wrapper designed as an alternative to jQuery for selecting and modifying elements in modern browsers. It functions as a modular DOM framework and JavaScript utility library, providing a system to wrap DOM nodes into actionable collections for batch processing. The project is built with a modular design that supports tree-shaking, allowing build tools to exclude unused methods to minimize the final bundle size. It provides mechanisms for extending the core functionality and collection prototypes to implement reusable plugins and c

This project is a comprehensive collection of web development exercises and application concepts designed to help developers practice and improve their technical proficiency. It serves as a curated resource for building diverse software projects, ranging from simple utility tools to complex, interactive web applications that demonstrate core programming and interface design skills. The repository distinguishes itself by providing a wide array of practical implementation challenges that cover the full spectrum of frontend and full-stack development. Users can engage with tasks that require man

This project is a comprehensive reference guide and directory of web browser capabilities. It serves as a technical map for accessing native operating system functions, hardware interfaces, and standard web APIs to bridge the gap between web applications and desktop or mobile environments. The resource provides detailed guidance on implementing Progressive Web App features, including offline caching, push notifications, and native installation prompts. It also catalogs methods for interacting with hardware peripherals via USB, Bluetooth, and NFC, as well as reading raw data from device sensor

This project is a reference library and collection of practical code samples for building browser extensions using WebExtensions APIs. It provides implementation guides and functional examples for core extension components, including content scripts, background processes, and browser action popups. The repository focuses on demonstrating specific implementation patterns for browser UI customization and web page manipulation. It includes samples for creating sidebars, context menus, and options pages, as well as techniques for injecting scripts and styles to alter DOM elements and page appeara

UserScripts is a collection of JavaScript browser userscripts designed to modify website behavior and add custom functionality to web browsers. It serves as a multi-purpose toolset for web page content automation, web interface enhancement, and specialized web scraping and downloading. The project distinguishes itself through a wide range of specialized utilities, including a browser-based text transformer for character encoding and terminology mapping, and tools for bypassing content censorship. It provides advanced web scraping capabilities such as deciphering obfuscated download links, agg

This repository is a collection of JavaScript coding challenges and a comprehensive interview guide. It provides reference implementations and educational examples designed to help developers master language fundamentals and prepare for technical interviews. The project covers a wide array of specialized implementations, including functional programming patterns like currying and partial application, as well as asynchronous patterns for concurrency control. It also includes practical examples of Document Object Model manipulation and the implementation of common data structures such as stacks

This project is a comprehensive frontend engineering study guide designed to cover the essential technical concepts of modern web development. It serves as a multi-disciplinary reference for mastering the browser execution engine, the JavaScript language, and the structural fundamentals of the web. The collection provides deep dives into JavaScript language internals, including execution contexts, closures, prototypes, and the event loop. It further details web browser internals, focusing on the critical rendering path, DOM construction, and engine mechanics. The guide also covers web securi

cmux is a GPU-accelerated terminal emulator and workspace manager designed for coordinating multiple concurrent AI coding agents. It functions as an orchestration terminal that uses scriptable workspaces and split panes to manage parallel AI agent workflows, while also serving as a headless browser automation tool and a remote development relay. The project differentiates itself through a programmatic control plane using a Unix domain socket and CLI, allowing for the automated management of terminal layouts and input delivery. It features an integrated web engine for programmatic DOM manipula

This project is a collection of technical demonstrations and prototypes that showcase various HTML5 APIs, multimedia capabilities, and web standard implementations. It serves as a frontend technology sandbox and a gallery of implementation proofs-of-concept for modern browser features. The collection includes specialized showcases for HTML5 multimedia, featuring the manipulation of audio, video, and real-time media streams. It also provides a series of experiments focused on prototyping web capabilities to verify technical feasibility and browser support in live environments. The project cov

PT-Plugin-Plus is a browser extension for torrenting that provides tools for private tracker automation, client integration, and site interface modification. It serves as a toolkit for managing torrent downloads, monitoring seed status, and automating repetitive tasks associated with private trackers. The system integrates directly with BitTorrent clients to send files from web pages to connected download clients with a single click. It features movie database integration, allowing users to find media across multiple sites using IMDb IDs or integrated search triggers. The project covers mult

Splide is a framework-agnostic TypeScript library for creating accessible, touch-enabled content carousels and image galleries. It provides a dependency-free implementation of sliders that support drag, swipe, and flick interactions across mobile and desktop browsers. The library distinguishes itself through a comprehensive accessibility layer using ARIA roles and screen reader support. It features a responsive breakpoint system that adapts slide dimensions and behavior based on screen width, alongside a plugin system for extending core functionality with custom components and transition effe

This project is a collection of reference implementations for vanilla web applications, interactive browser games, and core frontend development patterns. It consists of small web applications and tools built using standard HTML, CSS, and JavaScript without the use of external frameworks or libraries. The collection demonstrates various practical implementations, including browser-based mini games with arcade and word-guessing mechanics, as well as frontend interface prototypes. These examples cover the use of the native document object model for state manipulation and the implementation of i

UEditor is a web-based WYSIWYG rich text editor and HTML content authoring tool. It functions as a DOM-based text component that allows users to create and format complex web documents through a visual interface with real-time rendering. The editor enables the creation of rich text content for web applications and content management systems. It manages document state using HTML strings, facilitating the serialization and transfer of data between the browser and server. The system provides capabilities for managing editor content and configuring behavioral parameters through initialization se

This project is a structured JavaScript programming course and learning path designed for beginners. It functions as an interactive coding tutorial and frontend web development guide, providing a curriculum centered on the JavaScript language. The project focuses on building dynamic web interfaces through the manipulation of the Document Object Model. It provides a series of instructional guides and practical challenges that allow for interactive coding practice and the verification of code execution within a dedicated environment. The curriculum covers core programming fundamentals, includi

This project is a collection of community-developed plugins and a modular framework designed to extend the functionality of the Jupyter notebook environment. It serves as a customization tool that modifies the browser-based workspace through a system of injected scripts, stylesheets, and interactive components. The framework manages the lifecycle and registration of independent interface components using metadata-driven configuration. This allows users to enable or disable specific tools via a configuration menu to tailor the workspace without modifying the core application source code. The

TW-Elements is a Tailwind CSS component library and responsive UI kit providing a collection of pre-styled elements and templates. It functions as an interactive web element set and a customizable theme system for building website interfaces and landing pages. The project enables rapid frontend prototyping through a library of functional interface pieces, including modals, navigation bars, and forms. It provides a set of design blocks and sections specifically for creating mobile-first layouts. The library covers responsive web design and Tailwind CSS UI development. This includes the implem

This is a collection of small JavaScript projects and code samples that demonstrate the implementation of fundamental programming concepts through practical applications. The repository serves as a reference for building interactive user interfaces, managing application state, and integrating external APIs using vanilla JavaScript. The project focuses on the use of standard JavaScript without external frameworks to create interface elements such as modals, sliders, and galleries. It provides examples of organizing complex application logic through object-oriented patterns using classes and ob