window-open-popup-target.html

Enable keyboard shortcuts

<!DOCTYPE html>

<script>

  var channelName = window.name;

  var channel = new BroadcastChannel(channelName);

  const allBarProps = [

    window.locationbar.visible,

    window.menubar.visible,

    window.personalbar.visible,

    window.scrollbars.visible,

    window.statusbar.visible,

    window.toolbar.visible

];

  const allTrue = allBarProps.every(x=>x);

  const allFalse = allBarProps.every(x=>!x);

  channel.postMessage({isPopup: allFalse, mixedState: !allTrue && !allFalse});

  // Because messages are not delivered synchronously and because closing a

  // browsing context prompts the eventual clearing of all task sources, this

  // document should not be closed until the opener document has confirmed

  // receipt.

  channel.onmessage = function() {

    window.close();

};

</script>