Question

This regex currently accept dot at the end of nameserver. What I need is: ns1.test.com. and ns1.test.com is accepted but not ns1.test.com..

var re = /^([a-z0-9][a-z0-9-]*\.)+[a-z]{2,3}\.$/i;

Help me please. Thanks in advance.

Answer 1

The optional operator is, a ?.

So just make the regex:

var re = /^([a-z0-9][a-z0-9-]*\.)+[a-z]{2,3}\.?$/i;