| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Element Timing: do NOT observe elements from same-origin iframes</title> |
| <body> |
| <style> |
| body { |
| margin: 0; |
| } |
| </style> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/element-timing-helpers.js"></script> |
| <script> |
| async_test((t) => { |
| if (!window.PerformanceElementTiming) { |
| assert_unreached("PerformanceElementTiming is not implemented"); |
| } |
| const observer = new PerformanceObserver( |
| t.step_func_done((entryList) => { |
| assert_unreached("Should not have received an entry!"); |
| }) |
| ); |
| observer.observe({entryTypes: ['element']}); |
| // We add the iframe during onload to be sure that the observer is registered |
| // in time for it to observe the element timing. |
| // TODO(npm): change observer to use buffered flag. |
| window.onload = () => { |
| // Add iframe with an image of width and height equal to 100. |
| const iframe = document.createElement('iframe'); |
| iframe.src = 'resources/iframe-with-square.html'; |
| iframe.onload = () => { |
| // After a short delay, assume that the entry was not dispatched to the |
| // parent frame. |
| t.step_timeout(() => { |
| t.done(); |
| }, 100); |
| } |
| document.body.appendChild(iframe); |
| }; |
| }, 'Element in child iframe is not observed, even if same-origin.'); |
| </script> |
| |
| </body> |
