| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Largest Contentful Paint: observe image.</title> |
| <style> |
| #target { |
| background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="50"><rect fill="lime" width="100" height="50"/></svg>'); |
| width: 100px; |
| height: 50px; |
| } |
| </style> |
| <body> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/largest-contentful-paint-helpers.js"></script> |
| <script> |
| async_test(function (t) { |
| assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented"); |
| const beforeLoad = performance.now(); |
| const observer = new PerformanceObserver( |
| t.step_func_done(function(entryList) { |
| assert_equals(entryList.getEntries().length, 1); |
| const entry = entryList.getEntries()[0]; |
| let url = 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"'; |
| url += ' width="100" height="50"><rect fill="lime" width="100"'; |
| url += ' height="50"/></svg>'; |
| // green.svg is 100 by 50 |
| const size = 100 * 50; |
| checkImage(entry, url, 'target', size, beforeLoad); |
| }) |
| ); |
| observer.observe({type: 'largest-contentful-paint', buffered: true}); |
| t.step_timeout(() => { |
| assert_unreached("The image should have triggered an LCP entry."); |
| t.done(); |
| }, 1000); |
| }, 'Data-URI background SVG image is observable.'); |
| </script> |
| |
| <div id="target" width="100" height="50"></div> |
| </body> |
| |
