Mask US phone number string with JavaScript

Question

I need regular express for US Phone Number format.I want to replace the phone number string into below US phone number string format in JavaScript.

var numbe         


        

Answer 1

You can use regular expression and then concatenate to form your string.

var USNumber = "4031234789".match(/(\d{3})(\d{3})(\d{4})/);

USNumber = "(" + USNumber[1] + ") " + USNumber[2] + "-" + USNumber[3];