Good practice - how to properly use useComputedValue?

[damianfilipek81]

Hi, i've got quick question: is it bad idea to update skiaValues inside useComputedValue, based on other skiaValues? For example:

 const x = useValue(0)
  const y = useValue(0)
  const z = useValue(0)

  useComputedValue(() => {
    y.current = x.current + z.current
  }, [x, z])

I'm aware about useValueEffect, but it only accepts one argument instead dependency array, and that is not what i'm looking for.

[wcandillon]

@damianfilipek81 it's not a good idea but I agree that in some circumstances it is unavoidable.
We have a new Reanimated integration, did you look into it? https://shopify.github.io/react-native-skia/docs/animations/reanimated

[damianfilipek81]

@wcandillon Thanks for reply, we're using RNSkia in commercial project and soon we will have to update it to newest version, so i'll try to look at changes and implement that.
ps. I'm trying to fully understand the problem, could you provide me more information why it's not a good idea? Thanks!

[wcandillon]

There shouldn't be side effects in useComputedValue this is why we recommend against it. However we don't have an equivalent of useAnimatedReaction so useComputedValue might be used for that.