title: How do I include jQuery/bootstrap/javascript in my rails app with a CDN?
body: <p>I know you can add jQuery and bootstrap with gems, assets, and the application.css and application.js file. However, I would like to be able to add these files through a CDN.</p>
  
  <pre><code>&lt;link rel="stylesheet"             href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css"&gt;
  </code></pre>
  
  <p>I have added the above into my application.html.erb file, but I seem to not be able to use bootstrap or jQuery still. Can you please explain why rails doesn't allow linking in the html file? Why must we use gems?</p>