Creating "static" members in a javascript object [duplicate]

Question

Is there a way to create "static" members in a JS Object?

function Person(){

}

Person.prototype.age = null;
Person.prototype.gender = null;

I would like to add personsCount as a static member, is that possible?

Answer 1

Sure, just add Person.personsCount without the prototype

Answer 2

Common practise is to make such "static members" properties of the constructor function itself:

function Person() {
    Person.count++;
}
Person.count = 0;