typescript
Build apps that live inside AI app. the full-stack React framework for MCP apps and MCP servers.
Skybridge is a full-stack TypeScript framework for MCP Apps and ChatGPT Apps. Type-safe. React-powered. Platform-agnostic.
Make ship happen. Turborepo is the build system for JavaScript and TypeScript codebases.
Build system optimized for JavaScript and TypeScript, written in Rust.
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The Intuitive Vue Framework. Build your next Vue.js application with confidence using Nuxt. An open source framework making web development simple and powerful.
Ecosystem Performance. Cleanup, Speedup, Levelup. One package at a time.
The e18e project is an initiative to bring together the groups and individuals who are passionate about improving performance of the JavaScript ecosystem.
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QA via natural language AI tests. AI-powered natural language end-to-end testing framework.
Write tests in plain English and let AI handle the execution. Built on Playwright with seamless GitHub integration.
Type-safe Composable CSS.
From simple UI styles to full Design Systems, write code using Styleframe’s powerful TypeScript CSS API — AI-ready by design. Write type-safe, composable, future-proof Design Systems code using styleframe's powerful TypeScript CSS API.
A fast, zero dependency object and array comparison library. Significantly faster than most other deep comparison libraries and has full TypeScript support. Microdiff is a tiny (currently <1kb), fast, zero dependency object and array comparison library. It is significantly faster than most other deep comparison libraries, and has full TypeScript support.
Next-generation Node.js and TypeScript ORM for Databases. Prisma helps app developers build faster and make fewer errors with an open source database toolkit for PostgreSQL, MySQL, SQL Server, and SQLite.
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Framework reimagined for the edge!. Deliver instant apps at scale. Build instantly-interactive web apps without effort.
Qwik is a new kind of web framework that can deliver instant loading web applications at any size or complexity. Your sites and apps can boot with about 1kb of JS (regardless of application complexity), and achieve consistent performance at scale.
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Modular building blocks for building collaborative applications like Google Docs and Figma.
Yjs is a shared editing framework. It exposes Shared Types that can be manipulated like any other data type. But they are synced automatically!
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A JavaScript toolkit that saves you time and scales with your development process. Provides everything you need to build a Web app. Language utilities, UI components, and more, all in one place, designed to work together perfectly.
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The tooling that enables ESLint and Prettier to support TypeScript.
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Fast, all‑in‑one JavaScript parser and generator for RSS, Atom, RDF, and JSON Feed, with support for popular namespaces and OPML files. Fast, all-in-one parser and generator for RSS, Atom, RDF, and JSON Feed, with support for Podcast, iTunes, Dublin Core, and OPML files.
Feedsmith offers universal and format‑specific parsers that maintain the original feed structure in a clean, object-oriented format while intelligently normalizing legacy elements. Access all feed data without compromising simplicity.
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Welcome to JavaScript Rising Stars, your guide to the top trends and projects shaping the JS ecosystem.
interactive, collaborative html elements with a single data attribute.
playhtml is an open-source library for designing communal web experiences by enhancing web elements with real-time, collaborative interactivity.
Why does the internet feel lonely when we increasingly spend much of our time on it? I think it's because most of the internet is a solitary experience, by design: personal algorithmic feeds, content-focused websites, no indicator of who else is here with us right now.
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The library for faithful browser automation. High-fidelity fingerprinting for Bun, engineered for consistency and transparency.
mochi.js is a Bun-native, raw-CDP browser automation framework. Pass a seed and a profile; get a relationally-coherent fingerprint that survives a getParameter(0x9245) probe. JIT-friendly inject payload, Chromium-native fetch (real Chrome JA4 by definition), behavioral synth on top of Bezier+Fitts. Leaves no crumbs.
💌 Build and send emails using React.
A collection of high-quality, unstyled components for creating beautiful emails using React and TypeScript.
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The durable, distributed, and cloud-agnostic queue for Node.js.
Sidequest is a modern, scalable background job processor for Node.js applications. Built with TypeScript and designed for production use, it provides reliable job processing with multiple database backends, a beautiful web dashboard, and comprehensive monitoring capabilities.
Beautiful, open source, WebGPU-based charting library.
ChartGPU is a TypeScript charting library built on WebGPU for smooth, interactive rendering—especially when you have lots of data.
Bringing stdlibs of other programming languages to TypeScript for fun.
Locutus is ~500 TypeScript implementations of standard library functions from PHP, Go, Python, Ruby, C, and more. Each function is individually importable and tree-shakeable.
Most of these started as rainy Sunday afternoon puzzles. Some are genuinely useful. Some are just fun to write. All of them are a way to learn how different languages solve the same problems.
Dates by FormKit. The easiest way to work with dates in JavaScript. 📆 Parse, format, manipulate, and internationalize dates and times in JavaScript and TypeScript.
Tempo is a new library in a proud tradition of JavaScript date and time libraries. Inspired by the likes of moment.js, day.js, and date-fns Tempo is built from the ground up to be as small and easy to use as possible.
Ergonomic Framework for Humans. TypeScript with End-to-End Type Safety, type integrity, and exceptional developer experience. Supercharged by Bun.
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🐒 Bundler-free build tool for TypeScript libraries. Powered by tsc.
zshy (zee-shy) is a bundler-free batteries-included build tool for transpiling TypeScript libraries. It was originally created as an internal build tool for Zod but is now available as a general-purpose tool for TypeScript libraries.
The open-source package registry for modern JavaScript and TypeScript.
JSR is designed for TypeScript. You publish TypeScript source, and JSR handles generating API docs, .d.ts files, and transpiling your code for cross-runtime compatibility.
JSR packages are distributed as web-standard ECMAScript modules.
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The ultimate Object Relational Mapper for Node.js, Bun and Deno, offering seamless integration with a variety of popular databases. Orange ORM supports both TypeScript and JavaScript, including both CommonJS and ECMAScript.
Fast Rust bundler for JavaScript/TypeScript with Rollup-compatible API.
Rolldown is a JavaScript/TypeScript bundler written in Rust intended to serve as the future bundler used in Vite. It provides Rollup-compatible APIs and plugin interface, but will be more similar to esbuild in scope.
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safely install npm packages by auditing them pre-install stage. npq allows you to audit npm packages before you install them.
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The exhaustive Pattern Matching library for TypeScript with smart type inference.
Write better and safer conditions. Pattern matching lets you express complex conditions in a single, compact expression. Your code becomes shorter and more readable. Exhaustiveness checking ensures you haven’t forgotten any possible case.
Access the system clipboard (copy/paste).
Cross-platform. Supports: macOS, Windows, Linux (including Wayland), OpenBSD, FreeBSD, Android with Termux, and modern browsers.
Type-Safe Errors for JS & TypeScript. Encode failure into your program.
This package contains a Result type that represents either success (Ok) or failure (Err).
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Extensible Code Editor
CodeMirror is a code editor component for the web. It can be used in websites to implement a text input field with support for many editing features, and has a rich programming interface to allow further extension.
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Terminal UIs on a Native Zig Core. OpenTUI is a library for building terminal user interfaces (TUIs).
Build rich, interactive terminal interfaces with TypeScript bindings, first-class React/Solid support, and a C ABI for any language.
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compile-time expressions for TypeScript. ⚡️ Compile-time evaluation of expressions for smaller bundles!
A dead-simple TypeScript compiler that does one thing really well: enables compile-time evaluation of expressions marked with comptime.
The PDF library TypeScript deserves
Parse, modify, sign, and generate PDFs with a modern TypeScript API. The only library with incremental saves that preserve digital signatures.
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Pure JavaScript/TypeScript library for multiline text measurement & layout. Fast, accurate & supports all the languages you didn't even know about. Allows rendering to DOM, Canvas, SVG and soon, server-side.
Pretext side-steps the need for DOM measurements (e.g. getBoundingClientRect, offsetHeight), which trigger layout reflow, one of the most expensive operations in the browser. It implements its own text measurement logic, using the browsers' own font engine as ground truth (very AI-friendly iteration method).
OpenTUI is a library for building terminal user interfaces (TUIs).
OpenTUI is a TypeScript library for building terminal user interfaces (TUIs). It is currently in development and is not ready for production use. It will be the foundational TUI framework for both opencode and terminaldotshop.
a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, SVG and MathML. DOMPurify works with a secure default, but offers a lot of configurability and hooks.
A lightweight, PostgreSQL-backed job queue. Handle background jobs with ease.
DataQueue allows you to utilize your existing PostgreSQL database to process background jobs. No need for additional infra or services.
A lightweight, PostgreSQL-backed job queue for Node.js/TypeScript projects. Schedule, process, and manage background jobs with ease. Perfect for web apps (Next.js, etc.) deployed to serverless platforms like Vercel, AWS Lambda, etc.
Simple and modern async event emitter.
It works in Node.js and the browser (using a bundler).
Emitting events asynchronously is important for production code where you want the least amount of synchronous operations. Since JavaScript is single-threaded, no other code can run while doing synchronous operations. For Node.js, that means it will block other requests, defeating the strength of the platform, which is scalability through async. In the browser, a synchronous operation could potentially cause lags and block user interaction.
ESLint Plugin.
Automatically sort and organize objects, imports, types, enums, and JSX props. Ensure a clean and maintainable codebase with minimal effort.
Type-safe combinatorial CLI parser for TypeScript.
Express CLI constraints in code structure, not validation logic. Optique is a parsing library that focuses on extracting and validating command-line arguments. It doesn't dictate your application's structure, handle command execution, or provide scaffolding—it simply transforms command-line input into well-typed data structures.
The best way to build robust apps in TypeScript. Build production-ready applications in TypeScript.
Welcome to Effect, a powerful TypeScript framework that provides a fully-fledged functional effect system with a rich standard library.
Effect consists of several packages that work together to help build robust TypeScript applications. The core package, effect, serves as the foundation of the framework, offering primitives for managing side effects, ensuring type safety, and supporting concurrency.
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The open protocol for real-time sync to client applications.
HTTP-based durable streams for streaming data reliably to web browsers, mobile apps, and native clients with offset-based resumability.
Durable Streams provides a simple, production-proven protocol for creating and consuming ordered, replayable data streams with support for catch-up reads and live tailing.
A lightweight ts library for rendering the moon in glorious ascii characters.
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type safe SQL for TypeScript/JavaScript. Lightweight RDBMS agnostic TypeScript/JS abstraction for SQLite, PostgreSQL and MySQL.
SQL you know but type safe parameterized, expressive & portable.
litdb contains LINQ-like type-safe SQL builders for TypeScript/JavaScript for writing type-safe expressive SQL that's parameterized & portable across SQLite, MySQL & PostgreSQL.
One command. 25 languages. Universal multi-language runner and smart REPL written in Rust.
A universal code runner and stateful REPL written in Rust. Execute Python, JavaScript, TypeScript, Go, Rust, C, C++, Java, Kotlin, Swift, and 15 more languages with a single command.
Build ultra fast, tiny, cross-platform desktop apps.
Everything you need to build ultra fast, tiny, cross-platform desktop applications with TypeScript.
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TypeScript library for regex equivalence, intersection, complement and other utilities that go beyond string matching.
Zero-dependency TypeScript library for regex utilities that go beyond string matching. These are surprisingly hard to come by for any programming language. ✨
Make any TypeScript Function Durable.
use workflow brings durability, reliability, and observability to async JavaScript. Build apps and AI Agents that can suspend, resume, and maintain state with ease.
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Write Native with TypeScript.
Render native platform UI with direct access to native APIs automatically backed by TypeScript. ⚡ Write Native with TypeScript ✨ Best of all worlds (TypeScript, Swift, Objective C, Kotlin, Java, Dart). Use what you love ❤️ Angular, React, Solid, Svelte, Vue with: iOS (UIKit, SwiftUI), Android (View, Jetpack Compose), Flutter and you name it compatible.
NativeScript empowers you to access native APIs from JavaScript directly. Currently iOS, Android, and visionOS runtimes are provided for rich mobile development across a variety of diverse use cases.
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Type-safe WebGPU toolkit. A modular and open-ended toolkit for WebGPU, with advanced type inference and the ability to write shaders in TypeScript.
TypeScript library that enhances the WebGPU API, allowing resource management in a type-safe, declarative way.
API mocking library for browser and Node.js. Industry standard API mocking for JavaScript.
Mock Service Worker is an API mocking library that allows you to write client-agnostic mocks and reuse them across any frameworks, tools, and environments.
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Free to host and open-source cal.com / calendly alternative built on Google-Apps-Script for Gmail users. Built with modern technologies like React, TypeScript, Shadcn/UI, and Vite.
Open-source payment orchestration for TypeScript. Open-source TypeScript toolkit that unifies multiple payment providers behind a single, extensible API.
PayKit is a payments orchestration framework for TypeScript. It sits between your app and payment providers like Stripe or PayPal, giving you a unified API. Webhooks are verified and normalized automatically. Your database owns the subscriptions, invoices, and usage records — no provider lock-in.
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The Typescript AI framework.
Mastra is an opinionated Typescript framework that helps you build AI applications and features quickly. It gives you the set of primitives you need: workflows, agents, RAG, integrations, syncs and evals. You can run Mastra on your local machine, or deploy to a serverless cloud.
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The Web Platform Framework. Build web applications with speed and simplicity.
Brisa is an experimental web framework inspired by the others, taking the best of each one.
TypeScript-first schema validation with static type inference
Zod is a TypeScript-first schema declaration and validation library. I'm using the term "schema" to broadly refer to any data type, from a simple string to a complex nested object.
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The Fullstack Framework in Deno. Aleph.js gives you the best developer experience for building web applications.