Max Decimals

The script is very perfect. But it needs a parameter. MaxDecimals.
It would be pertinent to restrict the entry to only X number of decimal places.

`x = num.split(obj.decimalSeparator);
y = x[0];
z = x.length > 1 ? obj.decimalSeparator + x[1].slice(0, MaxDecimals) : "";
let rgx = /(\d+)(\d{3})/;

while (rgx.test(y)) {
  y = y.replace(rgx, "$1" + obj.separator + "$2");
}`