Is [\s\S] same as . (dot)?

When we include shorthand for character class and negated-character class in same character class, is it same as dot . which mean any character ?

I did a test on regex101.com and every character matched.

Is [\s\S] [\w\W] and [\d\D] same as . ?

I want to know if this behavior is persistent in web's front and backend languages like Javascript, Php, Python and others.