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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>CSS content attr example</title>
  <style>
    body {
      font-family: sans-serif;
      padding: 1.5rem;
      line-height: 1.6;
    }

    .tag::before {
      content: attr(data-label) ": ";
      font-weight: 600;
      color: #2563eb;
    }
  </style>
</head>
<body>
  <h1>attr() with content</h1>
  <p class="tag" data-label="Tip">Save your work frequently while learning CSS.</p>
</body>
</html>

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CSS content Property - attr() Label