Yet another JS code coverage tool that computes statement, line, function and branch coverage with module loader hooks to transparently add coverage when running tests. Supports all JS coverage use cases including unit tests, server side functional tests and browser tests. Built for scale.

jest

🃏 Painless JavaScript Testing.

jest-stackformatter-error

just a reproduction repo

joi-browser

Object schema validation

js-extractor

atom plugin for easily taking out a piece of code into a separate function or file, supports JSX

js-info-bubble

A library for customizable CSS3 InfoWindows in the Google Maps JavaScript API v3

js-lingui

🌍📖 A readable, automated, and optimized (5 kb) internationalization for JavaScript

jsdoc-type-asserts

plugin for systemjs which adds type assertions to your JSDoc annotated functions

jsdom

A JavaScript implementation of the WHATWG DOM and HTML standards, for use with node.js

json-stringify-safe

Like JSON.stringify, but doens't throw on circular references

jsonedit

User friendly, visual JSON editor built as an AngularJS directive.

jspm-aurelia

lightweight Aurelia boilerplate with hot reloading modules

jspm-aurelia-bundler

a lightweight tool on top of systemjs builder for proper bundling of your Aurelia apps

jspm-cli

Package management CLI

jspm-dev-buddy

JSPM development companion package, which either substitutes chokidar-socket-emitter or connects to it in order to provide the best development experience in Atom editor