Source code
Revision control
Copy as Markdown
Other Tools
<body></body>
<script>
window.onload = function() {
bc1 = new BroadcastChannel('no-cross-origin-messages');
bc2 = new BroadcastChannel('no-cross-origin-messages');
bc2.onmessage = e => {
parent.postMessage('done', "*");
};
// Post a message on bc1 and once we receive it in bc2, we know that the
// message should have been sent to bc0 if messages were being passed
// across origin (assuming compliance with the spec regarding message
// delivery in port creation order).
bc1.postMessage('ignition');
}
</script>