web development for the rest of us

The 1.x line is frozen - features and bugfixes now happen on https://github.com/yarnpkg/berry

Find and fix problems in your JavaScript code.

A tiny (118 bytes), secure, URL-friendly, unique string ID generator for JavaScript

☕️ Classic, reliable, trusted test framework for Node.js and the browser

HTTP server mocking and expectations library for Node.js

A mighty CSS linter that helps you avoid errors and enforce conventions.

A tiny (239B) utility for constructing `className` strings conditionally.

The recommended Code Splitting library for React ✂️✨

A better `npm publish`

Calculate the real cost to run your JS app or lib to keep good performance. Show error in pull request if the cost exceeds the limit.

JavaScript YAML parser and dumper. Very fast.

Markdown parser, done right. Commonmark support, extensions, syntax plugins, high speed - all in one. Gulp and metalsmith plugins available. Used by Facebook, Docusaurus and many others! Use https:…

✂️ An ES6+ aware minifier based on the Babel toolchain (beta)

Node.js Release Working Group

A Webpack plugin to enable "Fast Refresh" (also previously known as Hot Reloading) for React components.

DEPRECATED. Please use Next.js instead.

🙌 Give thanks to the open source maintainers you depend on! ✨

🔌 Renderless Containers

React component to highlight words within a larger body of text

📏 Compute measurements of a React component.

Streaming csv parser inspired by binary-csv that aims to be faster than everyone else

A tiny (304B to 489B) utility to check for deep equality

Delete files and directories

Magically generate all the @font-face rules

Normalize a URL

Use picocolors instead. It is 3 times smaller and 50% faster.

an animated GitHub ribbon

A lightweight CSS3 image viewer that is pretty to look and and easy to use

Seamless integration between Rollup and PostCSS.