| <!DOCTYPE html> |
| <title>Layout Instability: movement distance uses starting corner</title> |
| <link rel="help" href="https://wicg.github.io/layout-instability/" /> |
| <style> |
| |
| #shifter { position: relative; width: 100px; height: 100px; direction: rtl; background: blue; } |
| |
| </style> |
| <div id='shifter'></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); |
| |
| // Move the left edge rightward by 10px and the right edge leftward by 20px. |
| document.querySelector("#shifter").style = "width: 70px; left: 10px"; |
| |
| // The movement distance should use the displacement of the right edge. |
| const expectedScore = computeExpectedScore(100 * 100, 20); |
| |
| await watcher.promise; |
| assert_equals(watcher.score, expectedScore); |
| }, 'RTL element.'); |
| |
| </script> |