Browserify is an open-source JavaScript module bundler that allows developers to write and use Node.js-style modules that compile for use in the browser.
This adds the source of all the required modules and their dependencies used in <code>source.js</code> and bundles them in <code>target.js</code>. Browserify traverses the dependency graph, using your <code>source.js</code> as its entry point, and includes the source of every dependency it finds.