Objects in JavaScript. Why is 1 displayed and not 0?

Question

JavaScript

var obj = {'1': 0, 1: 1, 0: 2};
alert(obj['1']);
Why is the value of property 1 displayed and not property '1' ?
We are referring to the property '1', not 1.

Answer 1

Because the key is always a string. Any other types are cast to string