<!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>