| <!DOCTYPE html> |
| <title>Layout Instability: shift outside viewport</title> |
| <link rel="help" href="https://wicg.github.io/layout-instability/" /> |
| <style> |
| |
| body { margin: 0; } |
| #j { position: relative; width: 600px; height: 200px; top: 600px; } |
| |
| </style> |
| <div id='j'></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 = "800px"; |
| |
| // Since the element moves entirely outside of the viewport, it shouldn't |
| // generate a score. |
| await waitForAnimationFrames(3); |
| assert_equals(watcher.score, 0); |
| }, "Shift outside viewport."); |
| |
| </script> |
| |
| |
