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Fixes #8012 where a race condition with useEffect was causing stale renders of values. #8022

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merged 4 commits into from
Apr 23, 2021
Merged

Fixes #8012 where a race condition with useEffect was causing stale renders of values. #8022

merged 4 commits into from
Apr 23, 2021

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brainkim
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@brainkim brainkim commented Apr 22, 2021 •
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Fixes
#6699 (maybe)
#7694
#7896
#8012

A race condition with useEffect was causing stale renders of values when reactivevars were called multiple times synchronously.

@brainkim brainkim requested review from benjamn and jcreighton and removed request for benjamn April 22, 2021 19:59
@brainkim brainkim changed the title Brian 8012 fix Fixes #8012 where a race condition with useEffect was causing stale renders of values. Apr 22, 2021
@brainkim brainkim marked this pull request as draft April 22, 2021 20:05
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brainkim commented Apr 22, 2021 •
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Hang on it wasn’t the useLayoutEffect that did it. never mind it was I just didn’t inline consumeAndIterate() right

@brainkim brainkim marked this pull request as ready for review April 22, 2021 20:30
benjamn
benjamn reviewed Apr 22, 2021
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I think useLayoutEffect is an improvement, but I wonder if we can eliminate the onNextChange listening gap completely? Thoughts below.

src/cache/inmemory/reactiveVars.ts Show resolved Hide resolved
src/react/hooks/useReactiveVar.ts Show resolved Hide resolved
src/cache/inmemory/reactiveVars.ts Show resolved Hide resolved
src/react/hooks/__tests__/useReactiveVar.test.tsx Show resolved Hide resolved
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benjamn approved these changes Apr 23, 2021
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LGTM, thanks for adding that <StrictMode> test.

@brainkim brainkim merged commit a7393c6 into main Apr 23, 2021
@brainkim brainkim deleted the brian-8012-fix branch April 23, 2021 19:14
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