I always consult MDN regex whenever I need some help. Most of it is pretty simple: [a-z] - a range of characters .* - any number of characters or none .+ one o

I always consult MDN regex whenever I need some help. Most of it is pretty simple: [a-z] - a range of characters .* - any number of characters or none .+ one or more character. ^ - start of sequence $ - end of sequence But what I can’t seem to get is lookahead and look behind syntax! Always have to look it up!