Comments (6)
Well, I actually wanted to use useEffect everywhere and drop useLayoutEffect.
Yeah, we should always prefer using useEffect.
wondered how "safe" it would be for Hookstate
I'm not sure as I don't look into the recent hookstate code.
Updating refs in useEffect is probably fine for Blocking Mode.
The reason I use useLayoutEffect in react-tracked is for Concurrent Mode. (I have two useLayoutEffects for different reasons: a) to update refs and b) to subscribe. a) is the same in react-redux. b) is for my specific hack in my three libs [more info about the hack]).
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basically, a user interaction or network event CAN NOT TRIGGER any state change BEFORE useEffect is completed but AFTER dom drawing is completed?
from hookstate.
@dai-shi right or no? what do you think?
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for reference for the future: https://twitter.com/dai_shi/status/1227237850707447809
from hookstate.
https://reactjs.org/docs/hooks-reference.html#useeffect
Although useEffect is deferred until after the browser has painted, it’s guaranteed to fire before any new renders. React will always flush a previous render’s effects before starting a new update.
You can trigger state updates before effects, but it will not render.
So, React "state" won't change, but any other JS variables can change.
Note in CM, it can render multiple times before effect runs, so you can't reliably mutate variables in render functions.
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Nice thanks. It means I can boost the performance a little bit more
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Related Issues (20)
- Resource leak with `useHookstate` HOT 2
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- Request: throw error when trying to assign nested state to a Proxy object HOT 2
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from hookstate.