Important: This documentation covers Yarn 1 (Classic).

For Yarn 2+ docs and migration guide, see yarnpkg.com.

found 4,218 packages in 51ms

msw26.5mMIT2.11.5

Seamless REST/GraphQL API mocking library for browser and Node.js.

mswjsabout 3 hours agoapi, mock, mocking, worker

Low-level HTTP/HTTPS/XHR/fetch request interception library.

mswjs14 days agorequest, intercept, http, https

memfs95.4mApache-2.04.49.0

In-memory file-system with Node's fs API.

streamich3 days agofs, filesystem, fs.js, memory-fs

tinyspy79.1mMIT4.0.4

A minimal fork of nanospy, with more features

tinylibs21 days agospy, mock, typescript, method

sinon33.7mBSD-3-Clause21.0.0

JavaScript test spies, stubs and mocks.

sinonjs4 months agosinon, test, testing, unit

Packages

Lightweight debugging utility for Node.js and the browser

Lodash modular utilities.

React is a JavaScript library for building user interfaces.

A querystring parser that supports nesting and arrays, with a depth limit

Higher-order functions and common patterns for asynchronous code

Babel compiler core.