js thousands separator code example

Example 1: add comma to number javascript

var n = 34523453.345
n.toLocaleString()
"34,523,453.345"

Example 2: format number with commas js

foramtNumber = (num,div=",")=>{
  return num.toString().replace(/\B(?=(\d{3})+(?!\d))/g, div);

}

Example 3: how to format an integer with a comma in javascript

x.toString().toLocaleString(); // x must be a number