Hello Js Community,
Before I proceed, I will love to remind you that the mastermind behind computer science is mathematics and will always remain mathematics, so it's good to go mathematical when you fall into confusion in computer science.
In mathematics,a Set is a single collection of a distinct element,it can be string, numbers, flowers etc 😊.
In mathematics,we say A is a SuperSet of B when all B elements are present in A set.
In mathematics,we say B is a SubSet of A when all B elements exist in A set but A primary element doesn't exist in B Set. On the other hand, B makes up the existence of A but B exists without A.