jQuery-克隆元素的总和不适用于功能输入

Question

Here's my code:

$(document).ready(function() {
  $('#clone').click(function() {
    var target = $(this).closest('.groupcontainer');
    target.clone(true, true).insertAfter(target);
  });

  $('.input').on('input',function(){
    $(this).parent().children('.grouptotal').val($(this).val() * $(this).parent().children('.input2').val());
  });

  $('.input2').on('input', function(){
    $(this).parent().children('.grouptotal').val($(this).val() * $(this).parent().children('.input').val());
  });
});  

$(document).on('change', '.grouptotal', function(){
  var sum = 0;
    $('.grouptotal').each(function(){
    sum += +$(this).val();
    });
    $('#subtotal').val(sum);
});

My issue is that I need #subtotal to add every instance of .grouptotal , but #subtotal is not updating when it gets it's input from

$('.input').on('input',function(){
  $(this).parent().children('.grouptotal').val($(this).val() * 
  $(this).parent().children('.input2').val());
  });

$('.input2').on('input', function(){
  $(this).parent().children('.grouptotal').val($(this).val() *   
  $(this).parent().children('.input').val());
  });

#subtotal will update if I manually put numbers in .grouptotal however. Can someone explain to me what I'm missing?

Here's the Fiddle . It looks kind of sloppy but it gives the idea.

Quantity * System will automatically update my .grouptotal

How do I make it so #subtotal will take the .grouptotal s and add them up automatically? I've tried changing $(document).on('change', '.grouptotal', function(){ "change" to 'input' and a couple others, but no luck.

Also, it must work if the #clone button is clicked to duplicate the group.

Answer 1

使用val('value')以编程方式设置值时，不会触发change事件，您必须实际触发它

$(this).parent().children('.grouptotal').val( $(this).val() ).trigger('change')

Answer 2

Let's try this again. Evidently, changing the grouptotal values programmatically does not trigger the change event. I would have thought it would, so your code looked right to me. To fix, however, I added an explicit trigger of '.grouptotal'. You can see the fiddle here .

just add the code:

('.grouptotal').change();

to both of your handlers that sum from inputs. that might not be the solution you are looking for, but it seems to work