Question

how do I get this reference right, it returns “foo undefined”;

function myObject(){
    this.foo="bar"

    this.foo2=this.myMethod.foo3;

    alert(this.foo2);
}

myObject.prototype.myMethod= {
    foo3:'foo'+this.foo;
}

Answer 1

When you do this…

myObject.prototype.myMethod=
{
foo3:'foo'+this.foo;
}

the value of this is being evaluated from the current context where the object is being created, which likely doesn’t have a foo property.

---

Not sure why you’re calling it myMethod, but assigning an Object, but if you actually made it a method, you could then get the correct foo value.

function myObject(){
    this.foo="bar"
    this.foo2=this.myMethod();
    alert(this.foo2);
}
myObject.prototype.myMethod= function() {
    return 'foo'+this.foo;
};

var o = new myObject(); // alerts "foobar", and returns the new object