React 18 is broken in a weird way

React 18 includes concurrent rendering which might render a `useEffect` multiple times. If you rely on useEffect for onComponentDidMount, you might have to change that soon. Let's see how React 18 breaks this behavior in this release and what it means for you.

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Timestamps
0:00 Teaser
0:26 useEffect() before React 18
1:15 useEffect() after React 18
2:45 New useEvent() hook
4:48 Why this is happening?
6:30 Conclusion
7:52 Outro