| OLD | NEW |
|---|
| (Empty) | |
| 1 <!DOCTYPE html> |
| 2 <head> |
| 3 <title>Performance Paint Timing Test</title> |
| 4 </head> |
| 5 <body> |
| 6 <script src="../../resources/testharness.js"></script> |
| 7 <script src="../../resources/testharnessreport.js"></script> |
| 8 <div id="image"></div> |
| 9 |
| 10 <script> |
| 11 async_test(function (t) { |
| 12 var observer = new PerformanceObserver( |
| 13 t.step_func(function (entryList) { |
| 14 var entries = entryList.getEntries(); |
| 15 // Nothing contentful to be painted yet. |
| 16 assert_equals(entries.length, 1, |
| 17 "There should be only one paint timing instance delivered at
a time."); |
| 18 assert_equals(entries[0].entryType, "paint", |
| 19 "Expected entryType to be: paint."); |
| 20 if (entries[0].name == "first-paint") { |
| 21 t.first_paint_time = entries[0].startTime; |
| 22 } else if (entries[0].name == "first-contentful-paint") { |
| 23 assert_not_equals(t.first_paint_time, ""); |
| 24 t.first_contentful_paint_time = entries[0].startTime; |
| 25 assert_greater_than(t.first_contentful_paint_time - t.first_
paint_time, 100); |
| 26 observer.disconnect(); |
| 27 t.done(); |
| 28 } |
| 29 }) |
| 30 ); |
| 31 observer.observe({entryTypes: ["paint"]}); |
| 32 |
| 33 // Wait 100ms, then load image |
| 34 setTimeout(function() { |
| 35 var img = document.createElement("IMG"); |
| 36 img.src = "resources/circles.png"; |
| 37 document.getElementById('image').appendChild(img); |
| 38 }, 100); |
| 39 }, "First Paint triggered by non-contentful paint. Image load triggers First
Contentful Paint."); |
| 40 |
| 41 </script> |
| 42 <div style="background-color:black;color:white;padding:20px;"></div> |
| 43 |
| 44 |
| 45 </body> |
| 46 </html> |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2860143002:
Add tests for paint-timing, and move existing tests to same location (Closed)
