<!DOCTYPE html> <title>Layout Instability: partially clipped visual rect</title> <link rel="help" href="https://wicg.github.io/layout-instability/" /> <style> body { margin: 0; } #clip { width: 150px; height: 600px; overflow: hidden; } #j { position: relative; width: 300px; height: 200px; background: blue; } </style> <div id='clip'><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 = "200px"; // (clipped width 150px) * (height 200 + movement 200) const expectedScore = computeExpectedScore(150 * (200 + 200), 200); await watcher.promise; assert_equals(watcher.score, expectedScore); }, "Partially clipped visual rect."); </script>