HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>as Attribute Example</title>
  <link rel="preload" href="/styles/demo.css" as="style">
  <link rel="stylesheet" href="/styles/demo.css">
  <style>
    body {
      font-family: system-ui, sans-serif;
      margin: 0;
      padding: 1.5rem;
      background: #f8fafc;
      color: #334155;
      line-height: 1.7;
    }
    h1 {
      margin: 0 0 1rem;
      font-size: 1.25rem;
      color: #0f172a;
    }
    .hint {
      margin-top: 1rem;
      font-size: 0.8125rem;
      color: #64748b;
      max-width: 480px;
    }
  </style>
</head>
<body>
  <h1>as="style" preload</h1>
  <p>This page preloads <code>/styles/demo.css</code> with <code>as="style"</code>, then applies it as a stylesheet.</p>
  <div class="demo-banner"><strong>demo.css loaded</strong> — the green banner styles come from the preloaded file.</div>
  <p class="hint"><code>as</code> is used with <code>rel="preload"</code> (and similar hints), not on a regular <code>rel="stylesheet"</code> link alone.</p>
</body>
</html>

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HTML as Attribute — Preload Stylesheet