<!doctype html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width">
        <title>demo 5</title>
        <link rel="stylesheet" href="../../index.css">
    </head>
    <body>
        <p>Markup: <span id="markup"></span></p>
        <p>Outputs: <my-hello value="world"></my-hello></p>

        <button onclick="myHello.glam = !myHello.glam">toggle myHello.glam</button>

        <script>
            const span = document.getElementById('markup'