HTML Code

<!DOCTYPE html>

<html lang="en">

<head>

  <meta charset="utf-8">

  <title>checked reset</title>

  <style>

    body { font-family: sans-serif; padding: 16px; max-width: 480px; }

    label { display: flex; align-items: center; gap: 8px; font-size: 18px; }

    button { margin-top: 12px; padding: 10px 16px; background: #2563eb; color: #fff; border: none; border-radius: 6px; cursor: pointer; }

    #log { margin-top: 12px; color: #1e40af; font-weight: 600; }

  </style>

</head>

<body>

  <label><input type="checkbox" id="agree" checked> I agree to terms</label>

  <button type="button" id="reset">Reset with .prop('checked', false)</button>

  <div id="log"></div>

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

  <script>

    $("#reset").on("click", function() {

      $("#agree").prop("checked", false);

      $("#log").html(

        "checked via .prop(): " + $("#agree").prop("checked") + "<br>" +

        "Use .prop('checked', false) — not .removeProp('checked')"

      );

    });

  </script>

</body>

</html>

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jQuery .removeProp() — reset checked (Try It)