Yes JS is probably the most egregious. After having transitioned mostly to statically-typed languages, it seems positively backwards not to have the types, or

Yes JS is probably the most egregious. After having transitioned mostly to statically-typed languages, it seems positively backwards not to have the types, or even number of arguments specified as part of the signature to a function. I have even had to dig through the source of a library when the author has neglected to document an API well.