SquirrelGuy-5 Classes don't work in code.org but a lot of their functionality can be reconstructed by making a function which returns an object:

class Rect {
    constructor(w,h) {
        this.w = w;
        this.h = h;
    }
    area() {
        return this.w * this.h;
    }
}

is basically the same as

function Rect(w,h) {
    var obj = {};
    obj.w = w;
    obj.h = h;
    obj.area = function() { 
        return this.w * this.h;
    }
}

DragonFireGames
could it just be
function rect(w,h){
this.w = w;
this.h = h;
}
rect.prototype.area = function(){
return this.w * this.height;
}
and
var something = new rect(50,50); ?

what i'm saying is i don't really understand why you needed var obj = {};

ackvonhuelio That works as well, I just prefer using obj. Also, it makes it easier to use getters and setters.

Object.defineProperty(obj,"prop",{
    get: function(){return "value";},
    set: function(e){console.log(e);},
});

SquirrelGuy-5 Look, I can literally link a dynamically generated AI image: