HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>one paragraph click demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 480px; }
    p { padding: 10px; background: #fef3c7; border-radius: 6px; cursor: pointer; margin: 8px 0; }
    p:hover { background: #fde68a; }
    #hint { color: #7c2d12; font-weight: bold; margin-top: 12px; }
  </style>
</head>
<body>
  <p>First paragraph — click me once.</p>
  <p>Second paragraph — also one alert only.</p>
  <div id="hint">Each paragraph alerts on first click; second click on same p does nothing.</div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("p").one("click", function() {
      alert($(this).text());
      $("#hint").text("Alerted: " + $(this).text().slice(0, 40) + "...");
    });
  </script>
</body>
</html>

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jQuery p.one('click') — alert text once per paragraph (Try It)