Accessing a property of an object through a different property

I have structured my JavaScript file using objects and I am trying to assign one property (which is an array) to another property:

AvGen = {

    theBody: {
        bodies: [
            fooObj,
            foo2Obj,   // <--- need to move this property...
            foo3Obj
        ],
        bodyColor: '#DB6EDB',
        currBodyNr: 1,
        currBodyObj: AvGen.theBody.bodies[1]    // <--- ...to this property

// ... rest of the code

However, I keep getting an error message that says:

Uncaught ReferenceError: AvGen is not defined

If I remove 'AvGen' then it complains that 'theBody' is not defined. What should I do to make this work?

javascriptobjectproperties

Answer №1

If you're working with modern browsers, consider using a getter:

AvGen = {

    theBody: {
        bodies: [
            1,
            2,
            3
        ],
        bodyColor: '#DB6EDB',
        currBodyNr: 1,
        get currBodyObj() {
           return AvGen.theBody.bodies[AvGen.theBody.currBodyNr];
        }
    }
}

console.log(AvGen.theBody.currBodyObj); //2

FIDDLE

Alternatively, you can opt for a method instead of a property:

currBodyNr: 1,
currBodyObj: function() {
   return AvGen.theBody.bodies[AvGen.theBody.currBodyNr];
}

//...

console.log(AvGen.theBody.currBodyObj()); //2

Answer №2

The first step is to initialize the AvGen object and set its values based on the bodies parameter. Next, you can assign the desired value to this.currBodyObj using a function.

Answer №3

Avgen is not yet initialized on that specific line of code. To fix this, you should follow these steps:

AvGen = {};
AvGen.theBody = {};
AvGen.theBody.bodies = [fooObj, foo2Obj, foo3Obj];
AvGen.theBody.bodyColor = '#DB6EDB';
AvGen.theBody.currBodyNr = 1;
AvGen.theBody.currBodyObj = AvGen.theBody.bodies[1];
// and so forth..

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