To refer to this.property, there is a getter:

var foo = {
  a: 5,
  b: 6,
  get c() {
    return this.a + this.b;
  }
}

console.log(foo.c) // 11

however, is it possible to do this during object initialization:

var foo = {
  HIDING: 0,
  get state() {
    return this.HIDING;
  }
  [this.HIDING]: { x: 0, y: 0 },
}

I expect

foo: {
  HIDING: 0,
  state: 0,
  0: { x: 0, y: 0 }
}

Self-references in object literals / initializers this doesn't answer my question because it doesn't talk about using another property value as property name