| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Element Timing: image with scaling.</title> |
| <head> |
| <style> |
| /* The margin of 50px allows the rect to be fully shown when the div is scaled. */ |
| body { |
| margin: 50px; |
| } |
| .my_div { |
| width: 100px; |
| height: 50px; |
| transform: scale(2); |
| } |
| </style> |
| </head> |
| <body> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/element-timing-helpers.js"></script> |
| <script> |
| const 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 + '/images/black-rectangle.png'; |
| checkElement(entry, pathname, 'rectangle', 'rect_id', beforeRender, |
| document.getElementById('rect_id')); |
| checkRect(entry, [0, 200, 25, 125]); |
| checkNaturalSize(entry, 100, 50); |
| }) |
| ); |
| observer.observe({entryTypes: ['element']}); |
| }, 'Image intersectionRect is affected by scaling, but not its intrinsic size.'); |
| </script> |
| <div class="my_div" id='div_id'> |
| <img src="/images/black-rectangle.png" elementtiming="rectangle" id='rect_id'/> |
| </div> |
| </body> |
