title: How to use relatedTarget (or equivalent) in IE?
body: <p>Apparently IE (11) has an issue with <code>relatedTarget</code>, for example on <code>blur</code> events. Is there an alternative for IE to get the <code>relatedTarget</code>?</p>
  
  <p>Here is an example that produces an error in IE:
  <a href="https://jsfiddle.net/rnyqy78m/" rel="noreferrer">https://jsfiddle.net/rnyqy78m/</a></p>