| <!DOCTYPE html> |
| <html> |
| <meta charset=utf-8 /> |
| <title>Event Timing: PerformanceObserver with buffered flag and durationThreshold</title> |
| <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> |
| <div id='myDiv'>Click me</div> |
| <script> |
| promise_test(async t => { |
| assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.'); |
| // Add a PerformanceObserver and observe with a durationThreshold of 30 and buffered flag. |
| return new Promise(async resolve1 => { |
| // Add a slow click event and make sure it's dispatched to observers. |
| await new Promise(async resolve2 => { |
| // Observer to await until event entry is dispatched. |
| new PerformanceObserver(() => { |
| resolve2(); |
| }).observe({type: "event", durationThreshold: 16}); |
| await clickAndBlockMain('myDiv', { duration: 30 }); |
| }); |
| const afterFirstClick = performance.now(); |
| new PerformanceObserver(t.step_func(list => { |
| const pointerDowns = list.getEntriesByName('pointerdown'); |
| pointerDowns.forEach(entry => { |
| if (entry.processingStart < afterFirstClick) { |
| // It is possible that the first event gets a slow duration and hence gets buffered. |
| // In this case the minDuration must be at least 104, otherwise it shouldn't have been |
| // buffered. |
| verifyClickEvent(entry, 'myDiv', true /* isFirst */); |
| } else { |
| verifyClickEvent(pointerDowns[0], 'myDiv', false /* isFirst */, 16 /* minDuration*/); |
| resolve1(); |
| } |
| }); |
| })).observe({type: 'event', durationThreshold: 16, buffered: true}); |
| // This should be the only click observed since the other one would not be buffered. |
| await clickAndBlockMain('myDiv', { duration: 30 } ); |
| }); |
| }, "PerformanceObserver buffering independent of durationThreshold"); |
| </script> |
| </html> |
