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Regular expression to match wildcard in a subdomain and one additional domain

Moore

I'm writing a regex for a chrome extension in javascript and I want to target all the stackexchange subdomains and one outlier which is stackoverflow.com which doesnt have the same domain pattern.

https://bitcoin.stackexchange.com/

https://ethereum.stackexchange.com/

https://stackoverflow.com/

So far I have:

/^https://(www.)?stackoverflow.com/

This works to match stackoverflow, but when I try to add in the OR operator it doesn't work:

/^https://(*.)?(stackoverflow.com|stackexchange.com)/