Important: This documentation covers Yarn 1 (Classic).

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

found 2,178 packages in 15ms

chai102mMIT6.2.2

BDD/TDD assertion library for node.js and the browser. Test framework agnostic.

chaijs13 days agotest, assertion, assert, testing

Error constructor for test and validation frameworks that implements standardized AssertionError specification.

chaijsover 1 year agotest, assertion, assertion-error

mocha37.6mMIT11.7.5

simple, flexible, fun test framework

mochajs2 days agomocha, test, bdd, tdd

Type check values

sindresorhusabout 1 month agotype, types, is, check

lazy-ass20.3mMIT2.0.3

Lazy assertions without performance penalty

bahmutovover 2 years agoassertion, assertions, browser, debugging

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.