| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Largest Contentful Paint: size when image overflows</title> |
| <!-- In this test, an image with an intrinsic size of 100 x 50 is added, but |
| scaled up in order to overflow the viewport. It should not be reported. --> |
| <body> |
| <style> |
| body { |
| margin: 0px; |
| } |
| </style> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/largest-contentful-paint-helpers.js"></script> |
| <script> |
| const viewportWidth = document.documentElement.clientWidth; |
| const viewportHeight = document.documentElement.clientHeight; |
| async_test(function (t) { |
| assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented"); |
| const beforeLoad = performance.now(); |
| new PerformanceObserver( |
| t.step_func_done(function(entryList) { |
| assert_equals(entryList.getEntries().length, 1, 'Should have received only one entry!'); |
| const entry = entryList.getEntries()[0]; |
| if (entry.url) |
| assert_unreached('Should not have received an image entry!'); |
| }) |
| ).observe({type: 'largest-contentful-paint', buffered: true}); |
| // Add an image, setting width and height equal to viewport. |
| img = document.createElement('img'); |
| img.src = '/images/green-100x50.png'; |
| img.id = 'image_id'; |
| img.width = viewportWidth * 2; |
| img.height = viewportHeight * 2; |
| img.onload = () => { |
| const p = document.createElement('p'); |
| p.innerHTML = 'a'; |
| p.style = 'position: absolute; top: 10px; left: 10px;'; |
| document.body.appendChild(p); |
| } |
| document.body.appendChild(img); |
| }, 'The intersectionRect of an img element overflowing is computed correctly'); |
| </script> |
| </body> |