title: browserify exclude cannot find module
body: <p>I am trying to get a node module to work in the browser, but I don't want browserify to include the require inline as I am loading it separately.</p>
  <p>The problem is that even though I'm loading superagent with a <code>&lt;script&gt;</code> tag, browserify throws an exception: <code>Uncaught Error: Cannot find module superagent'</code></p>
  <h3>shell</h3>
  <p><code>browserify --x superagent source.js -o output.js</code></p>
  <h3>jade</h3>
  <pre><code>script(src='/bower/superagent/superagent.js')
  script(src='/js/output.js')
  </code></pre>
  <h3>souce.js</h3>
  <pre><code>var superagent = require('superagent');
  module.exports = { }
  </code></pre>
  <p>How can I exclude a require() from the browser without it throwing an exception?</p>