demo/page.html


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<!DOCTYPE html>
<html>

<head>
    <script>
        window.addEventListener("message", (e) => {
            if (e.data === "print") {
                window.print();
            }
        });
    </script>
</head>

<body>
    <main>
        <h1>Hello World</h1>
        <p>This is an example document</p>
    </main>
</body>

</html>