Question

I’m trying my mimic the comma insertion for input type=’number’ in FireFox since it doesn’t support it yet. Naively it works in Chrome. I got my regex to work…just not in the right order, I need to reverse it.

http://jsfiddle.net/hCTDV/2/

You can see that it will format the number as 123,4 instead of 1,234. I tried ‘reverse()’ but I can’t get that to work, Firefox states it’s not a function.

If somebody could adjust my regex so it properly performs the task I want that will be great, otherwise running it in reverse might do.

Answer 1

Try this method:

  $('input').keyup(function(){
    var $this = $(this);
    var num = $this.val().replace(/,/g, '');
    $this.val(num.replace(/(\d)(?=(\d{3})+(?!\d))/g, "$1,"));
  });

It seems a bit simpler and appears to work – http://jsfiddle.net/hCTDV/3/