| <!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> |
