HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>removeData official demo</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 520px; }

    div { background: #dbeafe; padding: 10px; border-radius: 6px; margin: 10px 0; }

    span { display: block; margin: 4px 0; color: #1e40af; }

    button { margin-top: 8px; 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 id="box">Data target</div>

  <p><span id="v1">value1 before creation: </span></p>

  <p><span id="v2">value1 after creation: </span></p>

  <p><span id="v3">value1 after removal: </span></p>

  <p><span id="v4">value2 after removal: </span></p>

  <button type="button">Run official demo</button>

  <p id="hint">Mirrors the jQuery API removeData demo.</p>

  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

  <script>

    $("button").on("click", function() {

      var $div = $("#box");

      $div.removeData();

      $("#v1").text("value1 before creation: " + $div.data("test1"));

      $div.data("test1", "VALUE-1").data("test2", "VALUE-2");

      $("#v2").text("value1 after creation: " + $div.data("test1"));

      $div.removeData("test1");

      $("#v3").text("value1 after removal: " + $div.data("test1"));

      $("#v4").text("value2 after removal: " + $div.data("test2"));

      $("#hint").text("test1 removed; test2 still VALUE-2.");

    });

  </script>

</body>

</html>

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jQuery .removeData() — official demo (Try It)