Question

I have the follow sample code:

type = 'Foo';

test = {
    type: {
        'fooVal': 'bar'
    }
}

alert(test.type.fooVal); // Bar
alert(test.Foo.fooVal); // TypeError: teste.Foo is undefined

How I can get the second alert to work?

I’ve tried:

test = {
    '"' + type + '"': {
        'fooVal': 'bar'
    }
}

But doesn’t work.

Answer 1

Use bracket notation to do the assignment instead:

type = 'Foo';
test = {};
test[type] = {fooVal: 'bar'};
alert(test.Foo.fooVal);

You can’t use variables as keys when assigning via object notation.