The biggest attraction of browserify over similar tools would have to be the inclusion of node.js core modules. Modules such as url, path, stream, events and http have all been ported for use in the browser. We can’t do everything that node can do, but we can do everything a browser can do using node.js style code.
The most immediately obvious core modules that are useful on the client-side are querystring, url and path. By requiring these core modules, we can easily parse and resolves urls, query strings and paths in a client script. On top of that, the process, Buffer, __dirname, __filename and global variables are all populated with Browserify. That means we can use process.nextTick to easily invoke a function on the next event loop (with full cross-browser support). A special process.browser flag is also set in browserify builds, so we can do a quick check to see if the script is running in a browser environment (as opposed to node.js for all the cross-environment module developers).
....