| <!DOCTYPE html> | |
| <body> | |
| <script> | |
| var portal = document.createElement("portal"); | |
| portal.src = "portal-post-message-portal.html"; | |
| document.body.appendChild(portal); | |
| var bc = new BroadcastChannel("portals-post-message"); | |
| bc.onmessage = () => { | |
| bc.close(); | |
| portal.activate().then(() => { | |
| error = ""; | |
| try { | |
| portal.postMessage("message"); | |
| } | |
| catch(err) { | |
| error = err.name; | |
| } | |
| bc = new BroadcastChannel("portals-post-message-after-activate"); | |
| bc.postMessage(error); | |
| bc.close(); | |
| }); | |
| } | |
| </script> | |
| </body> |