javascript - ReactJS - Does render get called any time "setState" is called? - Stack Overflow

Does React re-render all components and sub components every time setState() is called? If so, why? I thought the idea was that React only rendered as little as needed - when state changed. In the following simple example, both classes render again when the text is clicked, despite the fact that the state doesn't change on subsequent clicks, as the onClick handler always sets the state to the same

[koba04]

そうですよね