sticky-layout-no-change.html (899B)
1 <!DOCTYPE html> 2 <title>Layout Instability: sticky positioned layout no change</title> 3 <link rel="help" href="https://wicg.github.io/layout-instability/" /> 4 <script src="/resources/testharness.js"></script> 5 <script src="/resources/testharnessreport.js"></script> 6 <script src="resources/util.js"></script> 7 <div style="height: 3000px"></div> 8 <div id="sticky" style="position: sticky; width: 200px; height: 300px; bottom: 0"> 9 <div style="will-change: transform; height: 3000px; background: yellow"></div> 10 </div> 11 <script> 12 13 promise_test(async () => { 14 const watcher = new ScoreWatcher; 15 16 // Wait for the initial render to complete. 17 await waitForAnimationFrames(2); 18 19 // This doesn't change layout because the sticky element sticks to the bottom. 20 sticky.style.marginTop = "-1000px"; 21 22 await waitForAnimationFrames(3); 23 assert_equals(watcher.score, 0); 24 }, 'Sticky layout no change.'); 25 26 </script>