contain-paint-fully-clipped.html (920B)
1 <!DOCTYPE html> 2 <title>Layout Instability: fully clipped by contain:paint</title> 3 <link rel="help" href="https://wicg.github.io/layout-instability/" /> 4 <div style="contain: paint; height: 0; position: relative"> 5 <div id="target" style="position: absolute; top: 0; width: 400px; height: 400px; background: blue"></div> 6 </div> 7 <script src="/resources/testharness.js"></script> 8 <script src="/resources/testharnessreport.js"></script> 9 <script src="resources/util.js"></script> 10 <script> 11 12 promise_test(async () => { 13 const watcher = new ScoreWatcher; 14 15 // Wait for the initial render to complete. 16 await waitForAnimationFrames(2); 17 18 // Shift target, for which no shift should be reported because it's hidden. 19 document.querySelector("#target").style.top = '200px'; 20 21 await waitForAnimationFrames(2); 22 // No shift should be reported. 23 assert_equals(watcher.score, 0); 24 }, 'fully clipped by contain:paint'); 25 26 </script>