Why is the calculation not working correctly?

Question

JavaScript

Hello.
I ran into a problem when writing a script, the price is not calculated correctly, why - I can’t understand.

Script https://jsfiddle.net/sLbuxf15/6/ (a lot of extra things, classes, etc. - I know, this is just part of the general code), but I think the essence is clear.

For example, when you click on Любой текст 1- the price becomes 105 . But when you click on Любой текст 1it again, the price becomes 95 , although it should go back to 100 ..

Please help me, where did I make a mistake

Answer 1

Greetings.
Because you get the value of "price" via data() and set via attr() ,
but data is cached and not auto-updated if you set via attr, so either set/get via data or via attr, or set at the same time and in attr and in data.
By the way, you also have this bug - if you click not on the labels but on the checkbox itself.
Fix both bugs: https://jsfiddle.net/sLbuxf15/45/

Answer 2

well, you clearly wrote the logic for this)) there are no errors in the code)

if(inputCheck) {
  var str = prodprice - price; // при втором нажатии 100 - 5
} else {
  var str = prodprice + price; // при первом нажатии 100 + 5
}