postMessage-reload-child.html

Enable keyboard shortcuts

<!DOCTYPE html>

<html>

<head>

<meta charset="utf-8">

</head>

<body>

Child Window (B)

<script>

'use strict';

// This message is sent from parent's unload handler and because we

// should be not-fully active by the time the queued task runs

// we should never receive this.

window.addEventListener('message', (msg) => {

  window.parent.parent.postMessageTaskRan = true;

});

</script>

</body>

</html>