Doesn't make sense. You don't provide an entirely new object when you call `setState()`, just the parts of it that have changed. When you use `Object.assign()`

Doesn't make sense. You don't provide an entirely new object when you call `setState()`, just the parts of it that have changed. When you use `Object.assign()` then you're doing it, but you don't have to use that, and probably shouldn't.