script-clone-rerun.html | Explore in Territory

<!DOCTYPE>
<html>
<head>
<script>
var i = 0;
</script>
</head>
<body>
<p>This tests cloning a script element that has already started and inserting it into the document does not re-run the script. You should see PASS:</p>
<div><script> i++ </script></div>
<script>

if (window.testRunner)
    testRunner.dumpAsText();

var script = document.getElementsByTagName('script')[1];
var div = script.parentNode;
div.removeChild(script);
div.appendChild(script.cloneNode(true));

result = 'PASS';
if (i == 2)
  result = 'FAIL: script ran twice';
else if (i > 2)
  result = 'FAIL: script ran ' + i + ' times';
document.body.appendChild(document.createTextNode(result));

</script>
</body>
</html>

chromium/third_party/blink/web_tests/fast/dom/script-clone-rerun.html