1<!DOCTYPE html> 2<html class="test-wait"> 3<meta charset="utf-8"> 4<iframe id="iframe"></iframe> 5<script> 6 const srcdoc = ` 7 <!DOCTYPE html> 8 <meta charset="utf-8"> 9 <script> 10 const xhr = new XMLHttpRequest() 11 setTimeout(() => { 12 xhr.open('GET', '/', false) 13 xhr.send() 14 AbortSignal.timeout(41.62684667994843) 15 }, 1) 16 setTimeout(() => { 17 location.href = "about:blank" 18 parent.document.documentElement.classList.remove("test-wait") 19 }, 0) 20 </` + "script>"; 21 iframe.srcdoc = srcdoc; 22</script> 23