Add comma/dot to number input on keyup event

comma_input_keyup.js

$('input.number').val(function(index, value) {
    return value
    .replace(/\D/g, "")
    .replace(/\B(?=(\d{3})+(?!\d))/g, ",")
    ;
  }).keyup(function(event) {
      // skip for arrow keys
      if(event.which >= 37 && event.which <= 40) return;
      // format number
      $(this).val(function(index, value) {
        return value
        .replace(/\D/g, "")
        .replace(/\B(?=(\d{3})+(?!\d))/g, ",")
        ;
      });
});
//https://stackoverflow.com/a/2632502/794445
//<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
//<input class="number">