mutate a copy of data without changing the original source

React's new Context Api for preact

Render JSX to an HTML string, with support for Preact components.

Custom parser for ESLint

babel module loader for webpack

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

Run scripts that set and use environment variables across platforms

A JavaScript text diff implementation.

ECMAScript 5 compatibility shims for legacy JavaScript engines

Spectacular Test Runner for JavaScript.

Chai for Karma

Chai + Sinon-Chai + Sinon for Karma

A Karma plugin. Launcher for Chrome and Chrome Canary.

A Karma plugin. Adapter for Mocha testing framework.

Karma reporter with mocha style logging.

A Karma plugin. Launcher for PhantomJS.

Karma plugin for inline sourcemap support

Karma plugin that locates and loads existing javascript source map files.

Recursively mkdir, like `mkdir -p`

simple, flexible, fun test framework

Headless WebKit with JS API

Extend Chai with support for asserting JSX equality & contents.

Next-generation ES module bundler

Compile ES2015 with buble

Load entry from memory

JavaScript test spies, stubs and mocks.

Extends Chai with assertions for the Sinon.JS mocking framework.

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports loaders to preprocess files, i.e. json, jsx, es7