CODEWITHSUNDEEP
javascriptjquery
Tweath
Tweath

Reputation: 134

jQuery subtracting percentage*

I have a very basic question, how do I use the subtraction with percentage? More important is there even one for that? What's the page to the jQuery subtraction? I can't seem to find one.

What I want to do is a simple task but with no knowledge about subtracting percentage I can't do it.

I use data-val in the div to store the value, like in the HTML i have data-val="10"

10 as in 10%, so how do I make the jQuery to take the 10 in the data-val and subtract it?

<td width="200">Discount:</td>
<td width="100" align="right" class="discount" data-val="10">-29,8 kr</td>

with the following jQuery code.

jQuery(document).ready(function($){
    $('#cart_review .quantity').change(function (event) {
        $quan = $(this);
        console.log($quan.parent().next()[0]);
        $quan.parent().next().find('.price').text(function () {
            return $quan.val() * parseInt($(this).attr('data-val'), 10) + ' kr';
        });
            var total = 0;
            $('#cart_review .price').each(function(k, v){
                total += parseFloat($(v).text(), 10); 
            });

            $('.products').text(function() {
                return total + ' kr';
            });

            var shipping = 0;
            $('.shipping').text(function () {
                shipping = parseInt($(this).attr('data-val'), 10);
                return $(this).attr('data-val' + ' kr');
            });

            $('#cart_review #total').text(total + shipping + ' kr')
    });

});

Upvotes: 1

Views: 4091

Answers (1)

Barmar
Barmar

Reputation: 780808

jQuery doesn't have any arithmetic functions, you just have to use the built-in Javascript operators.

var discount_pct = parseInt($(".discount").data("val"), 10);
var discount = -(total * discount_pct/100); // percent means divide by 100

You can put the amount of discount in the discount field with:

$('.discount').text(-discount + ' kr');

Upvotes: 5

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