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Current behavior for use resulting in stuck isPending - #29209
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eps1lon
commented
May 22, 2024
| 'Value: initial, Pending: true', | ||
| 'Value: updated, Pending: true', | ||
| ]); | ||
| expect(root).toMatchRenderedOutput('Value: updated, Pending: true'); |
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We commit the value from the updated, resolved promise but don't flip isPending.
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May 22, 2024
Comparing: 81c5ff2...35b8802 Critical size changesIncludes critical production bundles, as well as any change greater than 2%:
Significant size changesIncludes any change greater than 0.2%: Expand to show
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eps1lon
commented
May 22, 2024
Comment on lines
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| const [isPending, startLocalTransition] = useTransition(); | ||
| click = () => { | ||
| startLocalTransition(() => { | ||
| setPromise( |
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Suggested change
| const[isPending,startLocalTransition]=useTransition(); | |
| click=()=>{ | |
| startLocalTransition(()=>{ | |
| setPromise( | |
| const[isPending,setIsPending]=useOptimistic(false); | |
| click=()=>{ | |
| startTransition(()=>{ | |
| setIsPending(true); | |
| setPromise( |
does work.
acdlite added a commit
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May 31, 2024
When a component suspends with `use`, we switch to the "re-render" dispatcher during the subsequent render attempt, so that we can reuse the work from the initial attempt. However, once we run out of hooks from the previous attempt, we should switch back to the regular "update" dispatcher. This is conceptually the same fix as the one introduced in #26232. That fix only accounted for initial mount, but the useTransition regression test added in f829733 illustrates that we need to handle updates, too. The issue affects more than just useTransition but because most of the behavior between the "re-render" and "update" dispatchers is the same it's hard to contrive other scenarios in a test, which is probably why it took so long for someone to notice. Closes#28923 and #29209 --------- Co-authored-by: eps1lon <sebastian.silbermann@vercel.com>
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May 31, 2024
When a component suspends with `use`, we switch to the "re-render" dispatcher during the subsequent render attempt, so that we can reuse the work from the initial attempt. However, once we run out of hooks from the previous attempt, we should switch back to the regular "update" dispatcher. This is conceptually the same fix as the one introduced in #26232. That fix only accounted for initial mount, but the useTransition regression test added in f829733 illustrates that we need to handle updates, too. The issue affects more than just useTransition but because most of the behavior between the "re-render" and "update" dispatchers is the same it's hard to contrive other scenarios in a test, which is probably why it took so long for someone to notice. Closes#28923 and #29209 --------- Co-authored-by: eps1lon <sebastian.silbermann@vercel.com> DiffTrain build for [adbec0c](adbec0c)
github-actionsBot
pushed a commit
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May 31, 2024
When a component suspends with `use`, we switch to the "re-render" dispatcher during the subsequent render attempt, so that we can reuse the work from the initial attempt. However, once we run out of hooks from the previous attempt, we should switch back to the regular "update" dispatcher. This is conceptually the same fix as the one introduced in #26232. That fix only accounted for initial mount, but the useTransition regression test added in f829733 illustrates that we need to handle updates, too. The issue affects more than just useTransition but because most of the behavior between the "re-render" and "update" dispatchers is the same it's hard to contrive other scenarios in a test, which is probably why it took so long for someone to notice. Closes#28923 and #29209 --------- Co-authored-by: eps1lon <sebastian.silbermann@vercel.com> DiffTrain build for commit adbec0c.
eps1lon
commented
Jun 2, 2024
CollaboratorAuthor
Fixed in #29670 |
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Summary
Test reproducing #28923
How did you test this change?
yarn test --watch packages/react-reconciler/src/__tests__/ReactUse-test.js -t "does not get stuck in pending state with usable values in state"