title: Defining global variable for Browserify
body: <p>I'm using SpineJS (which exports a commonjs module) and it needs to be available globally because I use it everywhere, but It seems like I have to do <code>Spine = require('spine')</code> on every file that uses Spine for things to work.</p>
  
  <p>Is there any way to define <code>Spine</code> once to make it globally available?</p>
  
  <p>PS: I'm using Spine as an example, but I'm in general wondering about how to do this with any other library.</p>