Example HTML (click "Example" to load):
<!DOCTYPE html>
<html lang="en">
<head>
<!-- This is a comment -->
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Example Page</title>
<style>
body { font-family: Arial, sans-serif; }
</style>
</head>
<body>
<div class="container">
<h1 class="title">Hello World</h1>
<p>This is an example HTML document.</p>
<ul>
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
</ul>
</div>
</body>
</html>