Browserify

Browserify is an open-source JavaScript tool that allows developers to write Node.js-style modules that compile for use in the browser.

With Browserify, you can write code that uses require() in the same way that you would use it in Node. Node.js and npm popularized use of the CommonJS require() statement to write modules, but web browsers don't have built-in support for CommonJS. With browserify, developers can make use of many of the hundreds of thousands of modules on npm in the browser.