<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html class="reftest-wait"> <style> summary { position: fixed; bottom: 0; right: 0; } </style> <script> function runTest() { var summary = document.getElementById("summary"); summary.dispatchEvent(new MouseEvent("click")); document.documentElement.removeAttribute("class"); } </script> <body onload="runTest();"> <details> <summary id="summary">Summary</summary> <p>This is the details.</p> </details> </body> </html>