A switch is literally a series of chained ifs. In most languages ir takes the form of a series of

    If(Variable == $CaseValue){
      Yield $CaseBody()
    }

But in some languages, like js, nothing is preventing you from hacking it to do something different.

EDIT: Just how petty, sheltered and dumb does a person have to be to downvote a statement of fact and then not leave a response to justify that? Grow up already.