Change input text field value by radio checked using jquery

Question

I want to display total price with sum by values of subtotal and shipping cost, But my code can't get subtotal value on input text field.

Example :

Subtotal: 200
Shipping A: 100 (checked)
Shipping B: 200
Totalprice: 300

or

Subtotal: 200
Shipping A: 100 
Shipping B: 200 (checked)
Totalprice: 400

Here's my code on jsfiddle .

Answer 1

Use .val() to set value not .html()

Also note, $(".subtotal") will return jQuery wrapped object but we need value of that element hence Use parseInt($(".subtotal").val()) to get parsed value of that input field. Use .text() instead of .html() if you wish to get text value than html

Try this:

 function updateCosts() { var totals = parseInt($(".subtotal").val()); $.each($('#content input[type=radio]:checked'), function() { totals += parseInt($.trim($(this).next('.shippingcost').text())); }); $('#totalPrice').val(totals); } $(document).ready(function() { $('#content input[type=radio]').change(updateCosts); //_____________________________^^^^^^^_^^^^^^^^^^^ //Use change event instead of click, handler can be attached this way }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script> Subtotal: <input type="text" value="200" name="subtotal" class="subtotal"> <div id="content"> A: <input type="radio" name="shippingcost" checked> <span class="shippingcost"> 100 </span> B: <input type="radio" name="shippingcost"> <span class="shippingcost"> 200 </span> </div> Total price: <input type="text" name="totalprice" id="totalPrice"> 

Fiddle here