cross-origin-middle-frame.html (628B)
1 <!DOCTYPE html> 2 <!-- This document is used for the test `move-node-local-root.html` --> 3 <script src="/common/get-host-info.sub.js"></script> 4 5 <body> 6 <script> 7 (async function() { 8 // This iframe will be cross-origin to the current document, but same-origin 9 // with its grandparent, our direct parent. 10 const iframe = document.createElement('iframe'); 11 iframe.src = new URL('resources/blank.html', get_host_info().HTTP_ORIGIN); 12 const loadPromise = new Promise(resolve => iframe.onload = resolve); 13 document.body.append(iframe); 14 await loadPromise; 15 16 parent.postMessage('grandchild loaded', '*'); 17 })(); 18 </script> 19 </body>