script-append.html | Explore in Territory

<!DOCTYPE html>
<script src="../../../resources/js-test.js"></script>
<script>
description('Test that an appended script does NOT invoke MutationObserver callbacks');

var mutationsDelivered = false;
function callback(mutations) {
    mutationsDelivered = true;
}

var observer = new MutationObserver(callback);
var div = document.createElement('div');
observer.observe(div, {attributes: true});
div.setAttribute('foo', 'bar');
shouldBeFalse('mutationsDelivered');
var scriptDidRun = false;
var script = document.createElement('script');
script.textContent = 'scriptDidRun = true';
shouldBeFalse('scriptDidRun');
document.head.appendChild(script);
shouldBeTrue('scriptDidRun');
shouldBeFalse('mutationsDelivered');
</script>

chromium/third_party/blink/web_tests/fast/dom/MutationObserver/script-append.html