Browser, os and device detection
Easily determine whether a user agent is a phone, tablet, desktop, text browser, or search engine spider.
What it does
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.