<!DOCTYPE html>
<html>
<head>
  <link id="shouldLoad" rel="import" href="hello.html" onload="handle(event)">
  <link id="shouldError" rel="import" href="nosuch.html" onerror="handle(event)">
</head>
<body>
<div id="toClick" onclick="handle(event)"></div>
<script>
document.currentScript.ownerDocument.getElementById('toClick').click();
</script>
</body>
</html>