format phone no is us style eg: (xxx)xxx-xxx

Question

How do I format plain 10 digit phone no. to us style (xxx)-xxx-xxxx using javascript regular expression.

Answer 1

This should do it: ^(\d{3})(\d{3})(\d{4})$

Here is a working example:

var testNumber = '1234567890';
var regex = /^(\d{3})(\d{3})(\d{4})$/;
var sub = '($1)-$2-$3';

var usNumber = testNumber.replace(regex, sub);

alert(usNumber);