| <!DOCTYPE HTML> |
| <head> |
| <meta charset=utf-8> |
| <title>Element Timing: observe element with a background image in a pseudo element</title> |
| <style> |
| body { |
| margin: 0; |
| } |
| #target::before { |
| content: ''; |
| width: 100px; |
| height: 100px; |
| background: url(resources/square100.png); |
| display: inline-block; |
| } |
| </style> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/element-timing-helpers.js"></script> |
| <script> |
| let beforeRender = performance.now(); |
| async_test(function (t) { |
| assert_implements(window.PerformanceElementTiming, "PerformanceElementTiming is not implemented"); |
| const observer = new PerformanceObserver( |
| t.step_func_done(function(entryList) { |
| assert_equals(entryList.getEntries().length, 1); |
| const entry = entryList.getEntries()[0]; |
| const pathname = window.location.origin + '/element-timing/resources/square100.png'; |
| checkElement(entry, pathname, 'my_div', 'target', beforeRender, |
| document.getElementById('target')); |
| checkRect(entry, [0, 100, 0, 100]); |
| checkNaturalSize(entry, 100, 100); |
| }) |
| ); |
| observer.observe({entryTypes: ['element']}); |
| }, 'Element with elementtiming attribute and a ::before background image is observable.'); |
| </script> |
| </head> |
| <body> |
| <div id='target' elementtiming='my_div'></div> |
| </body> |
