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React 18: Non-recoverable hydration mismatch if mismatch occurs in the same boundary as main script #22833
Comments
eps1lon
added
Type: Discussion
React 18
Yeah thats why we think this is a reasonable fallback
It shouldn't be a problem, the overhead seems low? cc @sebmarkbage |
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I think this is probably a bug. At the root, we should probably client render or use the old strategy of patching up. The issue is that we don't know how many children belong to the root unless we insert comments. The issue with Suspense boundaries is that they add to the semantics of the loading state so might see more than you should. We also have a concept of "backup boundaries" which are more suitable for this kind of thing. We haven't exposed them in the MVP though because we haven't finalized the API (avoidThisFallback). In general they're useful for enabling more fine grained partial hydration. The reason they necessary is because:
However, that just explains why we have backup boundaries for deeper in the tree. They can also be used for any general purpose error handling on the server because they can render a temporary state while the client renders instead. You probably shouldn't need that on the server though. It's probably better that you can have an error boundaries deal with it server side in that case. So that still leaves the case of client hydration mismatch. |
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The issue here is actually because we're hydrating into Thinking through how to fix this |
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I believe this is related to the issues people are seeing around hydration when 3rd party browser extension modifies the DOM. Here is a reproduction case: https://github.com/jacob-ebey/react-18-hydration-bug |
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@eps1lon can you confirm #24523 fixes this issue. I tested it here https://codesandbox.io/s/react-18-hydration-mismatch-in-document-fixed-24523-9n6zos?file=/package.json and believe it does. |
Sweet! Hydration errors are expected. But now we can at least recover. |
React version: 18.0.0-rc.1-next-cb1e7b1c6-20220303
Steps To Reproduce
<script />for main entrypointLink to code example: https://codesandbox.io/s/react-18-hydration-mismatch-in-document-6buos (based on https://codesandbox.io/s/kind-sammet-j56ro?file=/server/render.js:1054-1614 from reactwg/react-18#22)
The original issue was caused by a wrong usage of the Remix starter template:
The hydration mismatch happened due to a mismatch of
process.env.NODE_ENVbetween client and server.The current behavior
Whole UI is unmounted (i.e. no recovery via client-side only rendering) and the following errors are logged:
Errors when landing on the page
react-dom.development.js:14452 Uncaught Error: An error occurred during hydration. The server HTML was replaced with client content at throwOnHydrationMismatchIfConcurrentMode (react-dom.development.js:14452) at tryToClaimNextHydratableInstance (react-dom.development.js:14475) at updateHostComponent$1 (react-dom.development.js:20608) at beginWork (react-dom.development.js:22350) at HTMLUnknownElement.callCallback (react-dom.development.js:4128) at Object.invokeGuardedCallbackDev (react-dom.development.js:4177) at invokeGuardedCallback (react-dom.development.js:4241) at beginWork$1 (react-dom.development.js:27125) at performUnitOfWork (react-dom.development.js:26290) at workLoopSync (react-dom.development.js:26200) throwOnHydrationMismatchIfConcurrentMode @ react-dom.development.js:14452 tryToClaimNextHydratableInstance @ react-dom.development.js:14475 updateHostComponent$1 @ react-dom.development.js:20608 beginWork @ react-dom.development.js:22350 callCallback @ react-dom.development.js:4128 invokeGuardedCallbackDev @ react-dom.development.js:4177 invokeGuardedCallback @ react-dom.development.js:4241 beginWork$1 @ react-dom.development.js:27125 performUnitOfWork @ react-dom.development.js:26290 workLoopSync @ react-dom.development.js:26200 renderRootSync @ react-dom.development.js:26168 performConcurrentWorkOnRoot @ react-dom.development.js:25514 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 client-hook-6.js:1 Warning: An error occurred during hydration. The server HTML was replaced with client content in <#document>. r.<computed> @ client-hook-6.js:1 printWarning @ react-dom.development.js:86 error @ react-dom.development.js:60 errorHydratingContainer @ react-dom.development.js:11234 recoverFromConcurrentError @ react-dom.development.js:25597 performConcurrentWorkOnRoot @ react-dom.development.js:25526 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 react-dom.development.js:22649 Uncaught DOMException: Failed to execute 'appendChild' on 'Node': Only one element on document allowed. at appendChildToContainer (https://6buos.sse.codesandbox.io/main.js:11262:16) at insertOrAppendPlacementNodeIntoContainer (https://6buos.sse.codesandbox.io/main.js:24195:7) at insertOrAppendPlacementNodeIntoContainer (https://6buos.sse.codesandbox.io/main.js:24201:7) at commitPlacement (https://6buos.sse.codesandbox.io/main.js:24179:5) at commitMutationEffectsOnFiber (https://6buos.sse.codesandbox.io/main.js:24693:9) at commitMutationEffects_complete (https://6buos.sse.codesandbox.io/main.js:24586:7) at commitMutationEffects_begin (https://6buos.sse.codesandbox.io/main.js:24575:7) at commitMutationEffects (https://6buos.sse.codesandbox.io/main.js:24545:3) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:26919:5) at commitRoot (https://6buos.sse.codesandbox.io/main.js:26798:5) (anonymous) @ react-dom.development.js:22649 callCallback @ react-dom.development.js:4128 invokeGuardedCallbackDev @ react-dom.development.js:4177 invokeGuardedCallback @ react-dom.development.js:4241 reportUncaughtErrorInDEV @ react-dom.development.js:22648 commitMutationEffects_complete @ react-dom.development.js:24200 commitMutationEffects_begin @ react-dom.development.js:24187 commitMutationEffects @ react-dom.development.js:24157 commitRootImpl @ react-dom.development.js:26531 commitRoot @ react-dom.development.js:26410 finishConcurrentRender @ react-dom.development.js:25728 performConcurrentWorkOnRoot @ react-dom.development.js:25574 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 react-dom.development.js:22649 Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node. at removeChildFromContainer (https://6buos.sse.codesandbox.io/main.js:11298:15) at unmountHostComponents (https://6buos.sse.codesandbox.io/main.js:24289:9) at commitDeletion (https://6buos.sse.codesandbox.io/main.js:24350:5) at commitMutationEffects_begin (https://6buos.sse.codesandbox.io/main.js:24561:11) at commitMutationEffects (https://6buos.sse.codesandbox.io/main.js:24545:3) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:26919:5) at commitRoot (https://6buos.sse.codesandbox.io/main.js:26798:5) at performSyncWorkOnRoot (https://6buos.sse.codesandbox.io/main.js:26248:3) at flushSyncCallbacks (https://6buos.sse.codesandbox.io/main.js:12196:22) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:27046:3) (anonymous) @ react-dom.development.js:22649 callCallback @ react-dom.development.js:4128 invokeGuardedCallbackDev @ react-dom.development.js:4177 invokeGuardedCallback @ react-dom.development.js:4241 reportUncaughtErrorInDEV @ react-dom.development.js:22648 commitMutationEffects_begin @ react-dom.development.js:24175 commitMutationEffects @ react-dom.development.js:24157 commitRootImpl @ react-dom.development.js:26531 commitRoot @ react-dom.development.js:26410 performSyncWorkOnRoot @ react-dom.development.js:25860 flushSyncCallbacks @ react-dom.development.js:11803 commitRootImpl @ react-dom.development.js:26658 commitRoot @ react-dom.development.js:26410 finishConcurrentRender @ react-dom.development.js:25728 performConcurrentWorkOnRoot @ react-dom.development.js:25574 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 client-hook-6.js:1 The above error occurred in the <App> component: at App (https://6buos.sse.codesandbox.io/main.js:34968:21) Consider adding an error boundary to your tree to customize error handling behavior. Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries. r.<computed> @ client-hook-6.js:1 logCapturedError @ react-dom.development.js:18588 update.callback @ react-dom.development.js:18621 callCallback @ react-dom.development.js:13229 commitUpdateQueue @ react-dom.development.js:13250 commitLayoutEffectOnFiber @ react-dom.development.js:23177 commitLayoutMountEffects_complete @ react-dom.development.js:24431 commitLayoutEffects_begin @ react-dom.development.js:24417 commitLayoutEffects @ react-dom.development.js:24355 commitRootImpl @ react-dom.development.js:26544 commitRoot @ react-dom.development.js:26410 performSyncWorkOnRoot @ react-dom.development.js:25860 flushSyncCallbacks @ react-dom.development.js:11803 commitRootImpl @ react-dom.development.js:26658 commitRoot @ react-dom.development.js:26410 finishConcurrentRender @ react-dom.development.js:25728 performConcurrentWorkOnRoot @ react-dom.development.js:25574 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 react-dom.development.js:11817 Uncaught DOMException: Failed to execute 'appendChild' on 'Node': Only one element on document allowed. at appendChildToContainer (https://6buos.sse.codesandbox.io/main.js:11262:16) at insertOrAppendPlacementNodeIntoContainer (https://6buos.sse.codesandbox.io/main.js:24195:7) at insertOrAppendPlacementNodeIntoContainer (https://6buos.sse.codesandbox.io/main.js:24201:7) at commitPlacement (https://6buos.sse.codesandbox.io/main.js:24179:5) at commitMutationEffectsOnFiber (https://6buos.sse.codesandbox.io/main.js:24693:9) at commitMutationEffects_complete (https://6buos.sse.codesandbox.io/main.js:24586:7) at commitMutationEffects_begin (https://6buos.sse.codesandbox.io/main.js:24575:7) at commitMutationEffects (https://6buos.sse.codesandbox.io/main.js:24545:3) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:26919:5) at commitRoot (https://6buos.sse.codesandbox.io/main.js:26798:5) flushSyncCallbacks @ react-dom.development.js:11817 commitRootImpl @ react-dom.development.js:26658 commitRoot @ react-dom.development.js:26410 finishConcurrentRender @ react-dom.development.js:25728 performConcurrentWorkOnRoot @ react-dom.development.js:25574 workLoop @ scheduler.development.js:265 flushWork @ scheduler.development.js:238 performWorkUntilDeadline @ scheduler.development.js:532 run @ setImmediate.js:40 runIfPresent @ setImmediate.js:69 onGlobalMessage @ setImmediate.js:109 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 client-hook-6.js:1 The above error occurred in the <App> component: at App (https://6buos.sse.codesandbox.io/main.js:34968:21) Consider adding an error boundary to your tree to customize error handling behavior. Visit https://reactjs.org/link/error-boundaries to learn more about error boundaries. r.<computed> @ client-hook-6.js:1 logCapturedError @ react-dom.development.js:18588 update.callback @ react-dom.development.js:18621 callCallback @ react-dom.development.js:13229 commitUpdateQueue @ react-dom.development.js:13250 commitLayoutEffectOnFiber @ react-dom.development.js:23177 commitLayoutMountEffects_complete @ react-dom.development.js:24431 commitLayoutEffects_begin @ react-dom.development.js:24417 commitLayoutEffects @ react-dom.development.js:24355 commitRootImpl @ react-dom.development.js:26544 commitRoot @ react-dom.development.js:26410 performSyncWorkOnRoot @ react-dom.development.js:25860 flushSyncCallbacks @ react-dom.development.js:11803 postMessage (async) registerImmediate @ setImmediate.js:120 setImmediate @ setImmediate.js:27 schedulePerformWorkUntilDeadline @ scheduler.development.js:563 requestHostCallback @ scheduler.development.js:587 unstable_scheduleCallback @ scheduler.development.js:440 scheduleCallback$1 @ react-dom.development.js:27211 ensureRootIsScheduled @ react-dom.development.js:25459 scheduleUpdateOnFiber @ react-dom.development.js:25278 updateContainer @ react-dom.development.js:28483 hydrateRoot @ react-dom.development.js:28991 ./src/index.js @ index.js:12 __webpack_require__ @ bootstrap:19 0 @ index.js:12 __webpack_require__ @ bootstrap:19 (anonymous) @ bootstrap:83 (anonymous) @ bootstrap:83 react-dom.development.js:11817 Uncaught DOMException: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node. at removeChildFromContainer (https://6buos.sse.codesandbox.io/main.js:11298:15) at unmountHostComponents (https://6buos.sse.codesandbox.io/main.js:24289:9) at commitDeletion (https://6buos.sse.codesandbox.io/main.js:24350:5) at commitMutationEffects_begin (https://6buos.sse.codesandbox.io/main.js:24561:11) at commitMutationEffects (https://6buos.sse.codesandbox.io/main.js:24545:3) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:26919:5) at commitRoot (https://6buos.sse.codesandbox.io/main.js:26798:5) at performSyncWorkOnRoot (https://6buos.sse.codesandbox.io/main.js:26248:3) at flushSyncCallbacks (https://6buos.sse.codesandbox.io/main.js:12196:22) at commitRootImpl (https://6buos.sse.codesandbox.io/main.js:27046:3)The expected behavior
Not sure since I wouldn't be surprised if React couldn't do anything about it considering it probably unmounts its own
scripttag?React 17 behavior: https://codesandbox.io/s/react-17-hydration-mismatch-in-document-m22vv
The good thing is that frameworks can guard against author error by wrapping user code in Suspense boundaries so that any hydration mismatch from user code does not result in throwing away the main script (or too much in general). But that might require a lot of otherwise unnecessary Suspense boundaries (is that a problem?)
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