I found this example on the internet to understand cross realms and Symbols, however, I don't get the output the article states (both print false), am I replicating the example wrong? I want to try it because I want to learn about Symbols and cross kingdoms.
<body>
<iframe srcdoc="<script>var sharedSymbol = Symbol.for('Shared symbol');</script>"></iframe>
<script>
const iframe = document.querySelector("iframe");
const iframeWindow = iframe.contentWindow;
// Will print false!
console.log(iframeWindow.Symbol === Symbol);
// But will print true!
console.log(iframeWindow.sharedSymbol === Symbol.for("Shared symbol"));
</script>
</body>