How to get domain from a string using javascript regular expression

Question

As the title suggests, I\'m trying to retrieve the domain from a string using javascript regular expression.

Take the following strings:

String              


        

Answer 1

Use this regex:

/(?:[\w-]+\.)+[\w-]+/

Here is a regex demo!

Sampling:

>>> var regex = /(?:[\w-]+\.)+[\w-]+/
>>> regex.exec("google.com")
... ["google.com"]
>>> regex.exec("www.google.com")
... ["www.google.com"]
>>> regex.exec("ftp://ftp.google.com")
... ["ftp.google.com"]
>>> regex.exec("http://www.google.com")
... ["www.google.com"]
>>> regex.exec("http://www.google.com/")
... ["www.google.com"]
>>> regex.exec("https://www.google.com/")
... ["www.google.com"]
>>> regex.exec("https://www.google.com.sg/")
... ["www.google.com.sg"]