How do I include jQuery/bootstrap/javascript in my rails app with a CDN?

Question

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.

<link rel="stylesheet"             href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css">

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?

Answer 1

You need to add the js file before the closing body tag as well:

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js"></script>