| <!DOCTYPE html> |
| <title>Layout Instability: local shift without viewport shift</title> |
| <link rel="help" href="https://wicg.github.io/layout-instability/" /> |
| <style> |
| |
| #c { position: relative; width: 300px; height: 100px; transform: scale(0.1); } |
| #j { position: relative; width: 100px; height: 10px; background: blue; } |
| |
| </style> |
| <div id='c'> |
| <div id='j'></div> |
| </div> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="resources/util.js"></script> |
| <script> |
| |
| promise_test(async () => { |
| const watcher = new ScoreWatcher; |
| |
| // Wait for the initial render to complete. |
| await waitForAnimationFrames(2); |
| |
| document.querySelector("#j").style.top = "4px"; |
| |
| // Make sure no shift score is reported, since the element didn't move in the |
| // viewport. |
| await waitForAnimationFrames(3); |
| assert_equals(watcher.score, 0); |
| }, "Local shift without viewport shift."); |
| |
| </script> |