activeElement test

by nunoarruda

HTML

<iframe id="iframe" src="https://jsfiddle.net/nunoarruda/58ugeepo/show/"></iframe>

JavaScript

console.log(document.activeElement);

var iframe = document.getElementById('iframe');

  var input = iframe.contentDocument.getElementById('input');
  input.onfocus = function() {
    console.log(document.activeElement);
  };
  input.onblur = function() {
    document.activeElement.blur();
    console.log(document.activeElement);
  };