file_storage_copied.html

Enable keyboard shortcuts

<!DOCTYPE HTML>

<html>

<!--

This page is opened in a new window by test_storage_copied.html.

We need to return the sessionStorage value for the item "test-item",

by way of postMessage to the opener.

-->

<head>

<body>Opened!</body>

<script>

  let target = window.opener || window.parent;

  target.postMessage(

    window.sessionStorage.getItem("test-item"), "*");

</script>

</html>