Sites like swc.rs

Babel, an open-source JavaScript compiler project with documentation, a browser REPL and a team page, converting modern JavaScript to older-compatible code

The Oxc project's website describing a collection of open-source JavaScript tools written in Rust, including a compiler, with its team and sponsorship pages

accounts-js is a JavaScript authentication framework with client, server and database packages, documented on its API pages

Madeline's personal site (superchupu) with JavaScript coding notes, blog posts about her level-making projects, and the tinyglobby npm file-globbing tool

The Rollup JavaScript module bundler's official website, with documentation, FAQs, an online REPL and browser build guides

typescript-eslint is a documentation site for the ESLint plugin and parser that lint TypeScript code, with its rules and playground

A JavaScript testing framework named Jest, documented on its official site, with French and English pages and community help

ESLint project website: documentation, playground and team pages for ESLint, the pluggable open-source JavaScript linter

Vite, a frontend build tool and development server for modern web projects, documented by its core team

Vite, a frontend build tool and documentation site for modern web application development, with team and event pages

A testing framework called Vitest, powered by Vite, with documentation for writing, mocking and configuring JavaScript tests

Prettier, an opinionated code formatter for JavaScript, CSS, Markdown and other languages, with editor and CI integrations

JavaScript minifier Terser: a tool and documentation site for shrinking, mangling and compressing JavaScript code

PostCSS, a JavaScript tool documentation site for transforming CSS with plugins such as Autoprefixer and its API reference

Parcel, a zero-configuration JavaScript build tool for the web, with release announcements and blog posts from its team

TanStack, an open-source collection of headless web application libraries and tools, with a design system, blog and chat app

Fastify, a Node.js web framework project with documentation, community resources, benchmarks and a plugin ecosystem

Personal website of Hiroki Osame, a JavaScript/TypeScript engineer whose blog posts and open-source developer tools cover web development infrastructure

Yarn, a JavaScript package manager; its documentation and API reference for the @yarnpkg packages

Biome, an open-source toolchain for web projects that formats, lints, and checks JavaScript, TypeScript, and related code

A JavaScript UI library site for Preact, a small React-like framework, with its blog, docs and branding pages

Personal website of Anthony Fu, a design engineer and open source developer, with notes, talks, demos and tool pages

A component library and code distribution platform for building design systems with Park UI, Ark UI and Panda CSS, plus a Figma kit

Mocha, a JavaScript test framework for Node.js and browsers, with its project documentation and API reference

NAPI-RS is a Rust framework for building pre-compiled Node.js addons, with WebAssembly support and a changelog of releases

Personal website of Doctor Wu, an open source developer on the Vue and VueUse core teams, with talks, posts and sponsor links

MikroORM documentation for its TypeScript object-relational mapper and its database driver and tooling packages

Floating UI, a JavaScript library and documentation site for positioning tooltips, popovers and dropdowns next to reference elements

A developer tool, Jest Preview, that shows Jest test changes live in the browser, with a blog and docs

Poimandres, an open-source developer collective's site on React and three.js 3D graphics, with articles and projects by Christian Ortiz

Tauri 2.0, an open-source framework for building small, cross-platform desktop and mobile applications with web frontends and Rust backends

Stylelint, a linter for CSS and related stylesheet syntax, with documentation, changelog, contributing guide and vision pages

TkDodo's blog: personal blog by Dominik Dorfmeister on JavaScript, React, TypeScript, TanStack Query, API design and open source

Modern Web: guides, documentation and open-source tools for building websites on web standards, with browser-native code and minimal tooling

React Hook Form is a documentation site for a performant React form library, covering its API, TypeScript types and FAQs

A UI framework and documentation site for the Svelte web framework, which compiles components into minimal browser code

RSLint is a native, error-tolerant linter for JavaScript and ECMAScript code, with documentation for its rules and development

Motion, an open-source JavaScript and React animation library with docs, showcase examples and a paid Motion+ component kit

A JavaScript library documentation site for Sinon.JS, offering stubs, spies, fakes and mocks for unit tests

Ant Design, an open-source React UI component library and design system, with its release changelog and documentation

A React component library company offering free Material UI components and MUI X advanced data tools for building web interfaces

Elysia, an ergonomic TypeScript backend web framework with end-to-end type safety, documented on its official site and blog