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Stuff like https://reactjs.org/docs/hooks-faq.html#how-can-i-measure-a-...

If you're not aware of that, it is very tempting to use `useRef`, which is what I have often seen. Before hooks, we did not have the temptingly-named footgun `useRef` for this scenario (although we did have other footguns for other scenarios, and overall I love hooks).