Optionally using the CDN setup

Bootstrap also offers a setup using CDN to load the framework. It's much easier to set up but comes with some regards. Instead of the <link> that we created to load the CSS, we must load it from CDN using this:

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">

And to load the JavaScript file, replace the JavaScript <script> tag with the following line:

<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

There is some discussion on whether or not to use CDN. We will not touch upon this point, but the main pro is having the content provided faster with high availability. The main con is that you cannot have direct control over what is in the content provided, having unreliable imported code.

The decision of whether or not to use CDN depends on the case. You should consider the different arguments and choose an option that best fits your web page. There is no right or wrong, just different points of view.