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How to calculate each row with on change table <td><input> jquery

How to calculate each row with on change table jquery

<!DOCTYPE html>
<html>
<head>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
  <meta charset="utf-8">
  <title>Example</title>
</head>
<body>
  <table>
    <thead>
      <tr>
        <th>Quantity</th>
        <th>Price</th>
        <th>Total</th>
      </tr>
    </thead>
    <tbody>
      <tr>
        <td><input type="text" class="qty"></td>
        <td><input type="text" class="price"></td>
        <td><input type="text" class="total" disabled></td>
      </tr>
      <!-- ...and so on... -->
    </tbody>
  </table>
<script>
  (function() {
    "use strict";

    $("table").on("change", "input", function() {
      var row = $(this).closest("tr");
      var qty = parseFloat(row.find(".qty").val());
      var price = parseFloat(row.find(".price").val());
      var total = qty * price;
      row.find(".total").val(isNaN(total) ? "" : total);
    });
  })();
</script>
</body>
</html>

Source: stackoverflow.com

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