HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>prepend callback</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 480px; }
    .item { padding: 8px 10px; margin: 6px 0; background: #dbeafe; border-radius: 6px; }
    .tag { background: #6366f1; color: #fff; padding: 2px 8px; border-radius: 999px; font-size: 12px; margin-right: 6px; }
    button { margin-top: 12px; padding: 10px 16px; background: #6366f1; color: #fff; border: none; border-radius: 6px; cursor: pointer; }
    #hint { color: #64748b; font-size: 14px; margin-top: 10px; }
  </style>
</head>
<body>
  <div class="item">Alpha content</div>
  <div class="item">Beta content</div>
  <div class="item">Gamma content</div>
  <button type="button">Prepend numbered tags</button>
  <p id="hint">Callback returns HTML prepended before each item's text.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("button").on("click", function() {
      $(".item").prepend(function(index) {
        return "<span class='tag'>Top #" + (index + 1) + "</span> ";
      });
      $("#hint").text("Unique tag prepended to each .item via callback.");
    });
  </script>
</body>
</html>

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jQuery .prepend(callback) — per-item tags (Try It)