Regex to add a space after each comma in Javascript

Question

I have a string that is made up of a list of numbers, seperated by commas. How would I add a space after each comma using Regex?

Answer 1

Another simple generic solution for comma followed by n spaces:

"1,2, 3,   4,5".replace(/,[s]*/g, ", ");
> "1, 2, 3, 4, 5"

Always replace comma and n spaces by comma and one space.