In Javascript, can every function be considered a constructor of a class?

Question

I don't see any syntactic difference between an ordinary function, and one which behaves like a constructor for a class. So are they the same?

Does this mean that every single function we define has a property named 'prototype' by default?

Javascript hasn't got classes per say. – MMM Mar 19 '14 at 09:59 — MMM, Mar 19 '14 at 09:59

score 2 · Answer 1 · answered Mar 19 '14 at 10:01

Yes, every function has a property named prototype by default. The "construction" functionality is provided by the [[Construct]] internal property(invoked by new F()), which is set for every created function(see http://es5.github.io/#x13.2 - creating function objects, p18)

score 0 · Answer 2 · answered Mar 19 '14 at 10:07

Functions in JS have default property prototype, so to your question - yes.

But its very confusing to use it as a class structure within your code. I'd suggest you to check TypeScript language

Class hierarchy is similar to C#'s and compiler is compiling TypeScript code to confusing JavaScript for you :-)

In Javascript, can every function be considered a constructor of a class?

2 Answers2