javascript Reg Exp to match specific domain name

Question

I have been trying to make a Reg Exp to match the URL with specific domain name.

So if i want to check if this url is from example.com what reg exp should be the bes

Answer 1

There are cases where the domain you're looking for could actually be found in the query section but not in the domain section: https://www.google.com/q=www.example.com

This answer would treat that case better.
See this example on regex101.