I have a string A and want to test if another string B is not part of it. This is a very simple regex whose result can be inverted afterwards.
I could do:
/foobar/.test('foobar@bar.de')
and invert it afterwards, like this:
!(/foobar/).test('foobar@bar.de')
The problem I have is, that I need to do it within the regular expression and not with their result. Something like:
/!foobar/.test('foobar@bar.de')
(which does not work)
In other words: the regular expression should test for a non-existence and return true in that case.
Is this possible with JavaScript?