How to write regex that matches non digit elements in string, but with exception of "(" and ")"?

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I need it for this chlg: https://www.freecodecamp.com/challenges/validate-us-telephone-numbers
I need to check first does it contains any other character that is not digit, with exception of “(” , “)” .
And then to check other thing like validating number…

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var regex = /[\D()]/g

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Can u take look at this regex
(\d\d\d) \d\d\d-\d\d\d\d

I need to search for it in
1 (555) 555-5555

but no success, but when i put this like
(\d\d\d)\S \d\d\d-\d\d\d\d

It finds. I expect when i put in regex whitespace (" "), that it literaly search for, am i wrong? Why we need to set this \S thing?

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@nameToReachPeople try \(\d\d\d\) \d\d\d-\d\d\d\d

notice two extra “”

using only (\d\d\d) creates something called a Capturing group.

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