| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Element Timing: observe element with background image</title> |
| <body> |
| <style> |
| body { |
| margin: 0; |
| } |
| #target { |
| width: 100px; |
| height: 50px; |
| background-image: url('/images/black-rectangle.png'); |
| } |
| </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) { |
| if (!window.PerformanceElementTiming) { |
| assert_unreached("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 index = window.location.href.lastIndexOf('/'); |
| const pathname = window.location.href.substring(0, index - 14) + |
| 'images/black-rectangle.png'; |
| checkElement(entry, pathname, 'my_div', 'target', beforeRender, |
| document.getElementById('target')); |
| checkRect(entry, [0, 100, 0, 50]); |
| checkNaturalSize(entry, 100, 50); |
| }) |
| ); |
| observer.observe({entryTypes: ['element']}); |
| }, 'Element with elementtiming attribute and background image is observable.'); |
| </script> |
| <div id='target' elementtiming='my_div'></div> |
| </body> |
