HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>jQuery.removeData vs attr</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 480px; }
    #x { padding: 14px; background: #fef3c7; border-radius: 8px; margin-bottom: 12px; }
    button { margin: 4px 6px 4px 0; padding: 8px 12px; }
    #out { margin-top: 12px; padding: 12px; background: #f1f5f9; border-radius: 6px; white-space: pre-wrap; }
  </style>
</head>
<body>
  <div id="x" data-score="10">data-score="10"</div>
  <button type="button" id="read">Read</button>
  <button type="button" id="rm">jQuery.removeData(score)</button>
  <button type="button" id="rmAttr">Also removeAttr</button>
  <div id="out"></div>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    function show() {
      var el = $( "#x" )[ 0 ];
      $( "#out" ).text(
        ".data('score') = " + $( "#x" ).data( "score" ) +
        "\n.attr('data-score') = " + $( "#x" ).attr( "data-score" ) +
        "\njQuery.data(el,'score') = " + jQuery.data( el, "score" )
      );
    }
    $( "#read" ).on( "click", show );
    $( "#rm" ).on( "click", function () {
      jQuery.removeData( $( "#x" )[ 0 ], "score" );
      show();
    });
    $( "#rmAttr" ).on( "click", function () {
      jQuery.removeData( $( "#x" )[ 0 ], "score" );
      $( "#x" ).removeAttr( "data-score" );
      show();
    });
    show();
  </script>
</body>
</html>

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jQuery.removeData() vs data-* (Try It)