Javascripts中的总价格和数量

Question

Hi guys am trying to get the Total price and quantity of each items. So, i have a fixed price of $20. the price comes out fine but its not counting the quantity of each items....

HTML code

HTML-Continous

This is the code for Total Quantity and this works fine in an input field.

function changeval() {
    $total = parseInt($("#A1").val()) + parseInt($("#B1").val()) + parseInt($("#C1").val()) + parseInt($("#D1").val()) + parseInt($("#E1").val());

    $('.A').val($("#A1").val());
    $('.B').val($("#B1").val());
    $('.C').val($("#C1").val());
    $('.D').val($("#D1").val());
    $('.E').val($("#E1").val());
    $('.total').val($total);
}

HERE IS THE PROBLEM when i add this code, the Price comes out good but the quantity no longer SHOWS.

function changeval() {
    $price = parseInt($("#A1").val() * 20) + parseInt($("#B1").val() * 20) + parseInt($("#C1").val() * 20) + parseInt($("#D1").val()* 20) + parseInt($("#E1").val()* 20);

    $('.A').val($("#A1").val());
    $('.B').val($("#B1").val());
    $('.C').val($("#C1").val());
    $('.D').val($("#D1").val());
    $('.E').val($("#E1").val());
    $('.price').val($price);
}

so i want to have something like this

PRICE = 20 QUANTITY= 1 PRICE = 40 QUANTITY= 2 '' '' since i have 20 as a fixed price. Any help will be appreciated.

Answer 1

If you want to get both TotalQuantity & TotalPrice, you should calculate the TotalQuantity first, then calculate TotalPrice = TotalQuantity * 20 (since you have fixed price for all items).

$(document).ready(function() {
  // Handle onchange event for input number
  $('.qty').on('input', function() {

    $qty_total = 0;
    // Calculate total qty
    $(".qty").each(function() {
      $qty_total += parseInt($(this).val());
    });

    // Update to Qty input
    $("#qty_total").val($qty_total);

    // Update to Price input
    $("#price_total").val($qty_total * 20);
  })
})

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div>
  <table>
    <tr>
      <td>Item A</td>
      <td><input value=1 type="number" id="qty1" class="qty"></td>
    </tr>
    <tr>
      <td>Item B</td>
      <td><input value=2 type="number" id="qty2" class="qty"></td>
    </tr>
    <tr>
      <td>Item C</td>
      <td><input value=3 type="number" id="qty3" class="qty"></td>
    </tr>
    <tr>
      <td>Item D</td>
      <td><input value=4 type="number" id="qty4" class="qty"></td>
    </tr>
    <tr>
      <td>Item E</td>
      <td><input value=5 type="number" id="qty5" class="qty"></td>
    </tr>
    <tr>
      <td>Total Qty</td>
      <td><input id="qty_total"></td>
    </tr>
    <tr>
      <td>Total Price</td>
      <td><input id="price_total"></td>
    </tr>
  </table>
</div>

</div>