<!DOCTYPE html> <!-- Any copyright is dedicated to the Public Domain. - http://creativecommons.org/publicdomain/zero/1.0/ --> <html class="reftest-wait"> <script> function runTest() { // Append <summary> and <p> into <details>. var summary = document.createElement("summary"); var summary_text = document.createTextNode("Summary"); summary.appendChild(summary_text); var paragraph = document.createElement("p"); var details_text = document.createTextNode("This is the details."); paragraph.appendChild(details_text); var details = document.getElementById("details"); details.appendChild(summary); details.appendChild(paragraph); document.documentElement.removeAttribute("class"); } </script> <body onload="runTest();"> <details open id="details"> </details> </body> </html>