jquery sum of multiple input fields if same class in one input

Question

Hello I need to sum the values of same class input in one input with class name total.

Answer 1

$('.qty1').each(function(){
  sum += parseFloat(this.value);
   });
console.log(sum);

Answer 2

I think your issue is here:

$("#destination").val(sum);

change it to:

$(".total").val(sum);

---

And instead of change event i suggest you to use keyup instead.

$(document).on("keyup"

Answer 3

I suggest this solution:

html

<input type="text" class="qty1" value="" />
    <input type="text" class="qty1" value="" />
    <input type="text" class="qty1" value="" />
    <input type="text" class="qty1" value="" />
    <input type="text" class="qty1" value="" />
    <input type="text" class="qty1" value="" />

    <input type="text" class="total" value="" />

<div id="result"></div>

js

$(".qty1").on("blur", function(){
    var sum=0;
    $(".qty1").each(function(){
        if($(this).val() !== "")
          sum += parseInt($(this).val(), 10);   
    });

    $("#result").html(sum);
});

fiddle

Answer 4

You almost had it:

$(document).on("change", ".qty1", function() {
    var sum = 0;
    $(".qty1").each(function(){
        sum += +$(this).val();
    });
    $(".total").val(sum);
});

http://jsfiddle.net/DUKL6/1

Answer 5

The problem with all of the above answers is that they fail if you enter something other than a number. If you want something that is more friendly to users, you should do some validation, perhaps even give some feedback when a value other than a number is entered.

$('body').on('change', '.qty1', function() {
    var total=0;
    $(".qty1").each(function(){
        quantity = parseInt($(this).val());
        if (!isNaN(quantity)) {
            total += quantity;
        }
    });
    $('.total').val('Total: '+total);
});

Answer 6

$(document).on("keyup", ".qty1", function() {
    var sum = 0;
    $(".qty1").each(function(){
        sum += +$(this).val();
    });
    $(".total").val(sum);
});