<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html class="reftest-wait"> <script> function runTest() { var summary = document.getElementById("summary"); // Dispatch 'space' keys to the summary element. summary.dispatchEvent(new KeyboardEvent("keydown", {"keyCode": 32})); summary.dispatchEvent(new KeyboardEvent("keyup", {"keyCode": 32})); document.documentElement.removeAttribute("class"); } </script> <body onload="runTest();"> <details> <summary id="summary">Summary</summary> <p>This is the details.</p> </details> </body> </html>