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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<body>
Parent Window (A)
<script>
'use strict';
// On reload, we try postMessage to child frame. Its queued global task
// should not run, given that the document is no longer fully active.
window.addEventListener('unload', () => {
if (window[0]) {
window[0].postMessage('foo', '*');
}
});
window.addEventListener("message", () => {
parent.window.postMessage("done")
})
</script>
<iframe src="./postMessage-reload-child.html"></iframe>
</body>
</html>