title: How to detect which Bootstrap version is used from JavaScript?
body: <p>I've been looking at the <a href="https://github.com/twbs/bootstrap/tree/master/dist/css">CSS</a> &amp; <a href="https://github.com/twbs/bootstrap/blob/master/dist/js/bootstrap.js">JavaScript</a> from Bootstrap 3. Nothing is modularized under a common alias. For the JavaScript, it is injected into jQuery's prototype...</p>
  
  <p>How would it be possible to detect which version of Bootstrap is included in a user's web page from a third party plugin/library point of view with JavaScript?</p>