Sites like parceljs.org

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

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

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

A JavaScript toolkit, gulp.js, for automating build workflows with composable streaming tasks and plugins, documented through its project website

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

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

Rust-based open source platform of fast developer tools such as a JavaScript/TypeScript compiler, documented by its project team

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

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

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

A CSS minifier tool, cssnano, that runs formatted stylesheets through optimisations to shrink them for production

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

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

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

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

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

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

Can I use..., a reference site of browser support tables for web features such as HTML5, CSS3 and JavaScript

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

The official website of Vue.js, the open-source JavaScript framework for building web user interfaces, with its API reference and documentation

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

BootstrapVue is a library of Bootstrap v4 components and grid styles for Vue.js v2, with documentation and an online playground

Verdaccio, a lightweight private npm registry project with documentation, command-line reference, environment settings, testing guides and video talks

AVA, a GitHub repository hosting a Node.js test runner for running JavaScript unit tests concurrently

A community-built open source guide to web accessibility, with tutorials, a self-paced testing workshop, and a team led by Dave Rupert

A utility that automatically restarts Node.js applications when source files change, used during development

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

Emmet, a plugin toolkit for writing HTML and CSS faster in text editors, by developer Sergey Chikuyonok

Brad Garropy's personal blog on frontend development, side projects, open source, and his setup, with posts tagged coding

Serenity/JS, a TypeScript-native framework and modular NPM packages for acceptance and end-to-end test automation with Playwright, WebdriverIO and Cucumber

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

Aurelia, a JavaScript web application framework created by Rob Eisenberg, with documentation, learning resources and community contributors

Documentation and project site for Passport.js, an authentication middleware library for Node.js applications

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

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

Node.js, an open-source cross-platform JavaScript runtime for building servers, web apps, command line tools and scripts

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

Fluenticons is a free independent website for searching, previewing and downloading Microsoft's Fluent UI System Icons, with an AI agent interface