regexstringstylish

Regex with exceptions to certain keywords

I am trying to create regex expression (to use with Stylish extension for Firefox) that will render true for every string that has youtube.com, however will render false if string contains /user/ or /channel/.

Example

True
https://www.youtube.com/feed/trending

False
https://www.youtube.com/user/whateva/featured
https://www.youtube.com/channel/lfjafjsldsf

I don't even know where to start, tried to learn regex several times, but its beyond my understanding how it works.

Solution

  • I believe this should do it:

    ^.*youtube\.com((?!\/user\/|\/channel\/).)*$

    See live demo

    Proposed solution is using negative lookahead. For more information on that see: