Find Javascript subclasses

Question

How can I find all subclasses (both immediate, as well as all descendants) of a given Javascript "class"? Note that Prototype (v1.6.0) supports this with "subclasses", but I am wondering about plain Javascript.

Answer 1

JavaScript (at least ES5 and below) has no concept of classes, it only knows prototypes, which have no idea who used them as "super" or "sub" construction. The Prototype library only knows these relations when you exclusively use its own class model on top of plain JS, simply tracking it as part of its extension API.