title: .on('keyup', ..) not executing on input
body: <p>I'm having issues figuring out why keyup event is not working in the following situation (alert is not displayed), am using bootstrap 3 for forms, but I don't think <code>form-control</code> cancels keyup?</p>
  
  <p>HTML:</p>
  
  <pre><code>&lt;input type="number" name="visit_adults_number" id="visit_adults_number" class="form-control"&gt;
  </code></pre>
  
  <p>jQuery:</p>
  
  <pre><code>jQuery(document).ready(function ($) {
      'use strict';
  
      $('#visit_adults_number').on('keyup', function(){
          alert('Adult age');
      });
  
  }); /* END DOCUMENT READY */
  </code></pre>