disconnect-target.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /event-timing/disconnect-target.html - WPT Dashboard Interop Dashboard

<!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 === 'pointerdown');

    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>