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<!DOCTYPE html>
<html>
<meta charset=utf-8 />
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=/resources/testdriver.js></script>
<script src=/resources/testdriver-vendor.js></script>
<script src=resources/event-timing-test-utils.js></script>
<button id='the_button'>ClickMe</button>
<script>
async_test(function(t) {
assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.');
const observer = new PerformanceObserver(t.step_func_done((entryList) => {
const entries = entryList.getEntries().filter(e => e.name === 'mousedown');
if (entries.length === 0)
return;
// There must only be one click entry.
assert_equals(entries.length, 1);
const entry = entries[0];
// This checks that entry.target returns the correct button Node.
verifyClickEvent(entry, 'the_button', true);
const button = document.getElementById('the_button');
button.parentNode.removeChild(button);
// After removing the button, entry.target should now return null.
assert_equals(entry.target, null);
}));
observer.observe({entryTypes: ['event']});
clickAndBlockMain('the_button');
}, "Event Timing: when target is disconnected, entry.target returns null.");
</script>
</html>
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