<!DOCTYPE html>
<title>Custom Elements: CEReactions on HTMLSourceElement interface</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<meta name="assert" content="src, type, srcset, sizes, media of
  HTMLSourceElement interface must have CEReactions">
<meta name="help" content="https://html.spec.whatwg.org/#the-source-element">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../resources/custom-elements-helpers.js">