title: How can I get the height of select2 drop-down?
body: <p>I am trying to get select2 drop-down actual rendered height, but:</p>
  
  <p>If i use something like this:</p>
  
  <pre><code>$('#my-input-s2').on('select2-open', function() {
      var height = $(".my-dropdown").first().height()
      console.log(height)
    })
  </code></pre>
  
  <p>The result is always 29</p>
  
  <p>And when i use this(because select2 is not fullly open because of reading remote data:</p>
  
  <pre><code> $('#my-input-s2').on('select2-open', function() {
      var height = setTimeout($(".my-dropdown").first().height(),0)
      console.log(height)
    })
  </code></pre>
  
  <p>I result is gradually increasing value on every open of select2 (eg. 102, then 109, then 114)</p>
  
  <p>But I need to determine the height of dropdown when the select2 is fully open
  * edit (fully open = when the openning is done)
  Thanx for your answers</p>