| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Element Timing: observe inline image</title> |
| <body> |
| <style> |
| body { |
| margin: 0; |
| } |
| #inline_wee { |
| display: 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]; |
| // Only the first characters of the data URI are included in the entry. |
| const uriPrefix = 'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKAQMAAAC3/F3+AAAABGdBTUEAALGPC/xhBQAAACBjSFJNAA'; |
| checkElementWithoutResourceTiming(entry, uriPrefix, 'my_img', 'inline_wee', |
| beforeRender, document.getElementById('inline_wee')); |
| // The image is a red square of length 10. |
| checkRect(entry, [0, 10, 0, 10]); |
| checkNaturalSize(entry, 10, 10); |
| }) |
| ); |
| observer.observe({entryTypes: ['element']}); |
| }, 'Inline image is observable via Element Timing.'); |
| </script> |
| <img elementtiming='my_img' id='inline_wee' src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKAQMAAAC3/F3+AAAABGdBTUEAALGPC/xhBQAAACBjSFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAABlBMVEX/AAD///9BHTQRAAAAAWJLR0QB/wIt3gAAAAtJREFUCNdjYMAHAAAeAAFuhUcyAAAAJXRFWHRkYXRlOmNyZWF0ZQAyMDE5LTA0LTA1VDIwOjA4OjQxKzAyOjAwPa6EZwAAACV0RVh0ZGF0ZTptb2RpZnkAMjAxOS0wNC0wNVQyMDowODo0MSswMjowMEzzPNsAAAAASUVORK5CYII="/> |
| </body> |
