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<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=UTF-8>
  <meta name=viewport content="width=device-width,initial-scale=1">
  <title>as Attribute Example</title>
  <link rel=preload href=/styles/demo.css as=style>
  <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:.8125rem;color:#64748b;max-width:480px}</style>
</head>
<body>
  <h1>as="style" preload</h1>
  <p>This page preloads a stylesheet and tells the browser the resource type with <code>as="style"</code>.</p>
  <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.</p>
</body>
</html>

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HTML as Attribute — Preload Stylesheet