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<html><body><h1>The HTML Dialog Object</h1><h2>The showModal() Method</h2><p>Click the button to show a modal dialog.</p><button onclick="myFunction()">Show dialog</button><p><b>Note:</b> Use the "Esc" button to close the modal.</p><dialog id="myDialog">This is a dialog window</dialog><script>function myFunction() { document.getElementById("myDialog").showModal(); } </script></body></html>