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Graph/ssr-client-server-mismatch

AntiPattern

SSR Client/Server Mismatch

ssr-client-server-mismatch

Server-only code and client-only libraries get executed in the wrong rendering context during SSR, causing mis-typed imports and runtime destructuring failures (e.g., ApolloProvider missing, undefined configs), and producing misleading TypeScript or bundler errors that vanish when wrappers change.

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Public graph metadata

Updated6/25/2026

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30 linked nodes

MATCHESSolution

Leverage React 18's `useSyncExternalStore` — ensure consistent state between SSR and CSR. Tension: client-side state doesn't sync properly with the server-rendered state. Outcome: to ensure consistent state between SSR and CSR.

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so by wrapping components like — import dynamic from 'next/dynamic';. Tension: your child components will not use ssr. Outcome: remember to add 'use client' as well.

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Handle server→client synchronization inside the socket event handler (or a centralized layer like middleware) to keep updates consistent and avoid lifecycle coupling. Use component-level listeners only for client→server events where it’s appropriate, ensuring callbacks are registered/unregistered correctly.

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Just make your component a Client Component — React hooks work only in Client Components.

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Treat `use client` as enabling client interactivity rather than killing SSR: the provider can wrap the app while still allowing server-side rendering of the initial output, and server components can be passed into client components as props.

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Tension: every other upgrade falls through to Next's own upgrade listener. Outcome: No `noServer: true`, no manual `server.on('upgrade', …)`, no path routing.

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Tension: prevents you from interact with other elements. Outcome: working playground: https://stackblitz.com/edit/stackblitz-starters-gl6ghw?description=The%20React%20framework%20for%20production&file=app%2Fpage.tsx,app%2Fglobals.css&title=Next.js%20Starter.

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Checkout react-query documentation - https://tanstack.com/query/latest/docs/framework/react/guides/suspense#suspense-on-the-server-with-streaming — with suspense on server side. Tension: this working with suspense on server side. Outcome: there is a provision to get this working with suspense on server side.

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Tanstack actually provides a remix example in their post about SSR. Tension: you can't send the QueryClient from the server to the client.

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return response.data; — queryFn: async () => { const response = await fetchMaterial();. Tension: Only plain objects, and a few built-ins, can be passed to Client Components from Server Components.

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Align Tanstack Query package versions per the official React Query SSR/Next.js guide and use the correct SSR hydration components (Hydrate/DehydratedState/QueryClientProvider) as shown in the documentation.

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If you're using superjson in server make sure to add it in client also — using superjson in server. Tension: backend is receiving an empty input. Outcome: the docs specify how to use it https://trpc.io/docs/server/data-transformers#using-superjson.

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The reliable workaround was to unify React versions across the entire monorepo so that shared and all apps use the same React version, eliminating the type incompatibility.

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explicitly configuring Prisma to generate the client binaries to a custom output directory `node_modules/prisma-client` — // prisma/schema.prisma generator client { provider = "prisma-client-js". Tension: Then doing a search-and-replace of the import statements, replacing `from '@prisma/client'` with `from 'prisma-client'`. Outcome: output = "../node_modules/prisma-client".

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Replace `userouter` with Next.js' `useRouter` hook (e.g., `import { useRouter } from 'next/router'; const router = useRouter();`) and ensure routing code is SSR-compatible.

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there is `next-mdx-remote-client` which can be used instead — with the latest version of Next.js. Outcome: A few changes need to be made but it isn't a lot overall.

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Change the imports to use proper type-only syntax, e.g. `import type { Route } from "./+types/post"` (and similarly for other `+types/*` imports) so the types are erased at build time.

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Upgrade Angular to a version where the CommonEngine bug is fixed, and switch SSR rendering to use AngularNodeAppEngine with server-side routing enabled (instead of CommonEngine). Configure the server routing/app engine accordingly so parameterized routes resolve on direct requests.

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`@apollo/server` is the replacement for `apollo-server` — Instead, you should be using Apollo v4. Outcome: import { ApolloServer } from '@apollo/server'; import { startServerAndCreateNextHandler } from '@as-integrations/next';.

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You are going to have to use 11.1.4 — Amplify doesn't support Nextjs 12 yet. Tension: the build is error when starting SSR build. Outcome: use 11.1.4.

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Use environment checks like `typeof window === 'undefined'` to determine server vs client, and start Next.js with Node inspector (`NODE_OPTIONS='--inspect' next dev`) to attach Chrome DevTools to debug server-side code.

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Update @datastax/astra-db-ts to the latest version (e.g., `npm install @datastax/astra-db-ts@latest`) to resolve the client-loading error.

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have you restarted the nextjs development server? — Ensure `tsconfig.json` is being used by the ts compiler. Tension: The import order, make sure that `utils.d.ts` file is being imported before any other file that uses custom declarations. Outcome: if the problem persist, could you share the webpack/ babel configs?

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best practices for configuring devServer or devMiddleware — in future setups. Tension: prevent such vulnerabilities. Outcome: without upgrading the entire Vue CLI or webpack stack.

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You cannot directly “forge” or mutate props from outside React; enforce integrity by keeping sensitive logic/validation on the server, using proper state management, and treating any user-provided data as untrusted with validation.

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The bundler needs to bridge those two formats. Tension: Slider becomes an object like { __esModule: true, default: function Slider() {} } instead of the `function Slider()` React expects. Outcome: React gets a Wrapper Object.

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I needed to use `@prisma/client/edge` — my server action. Tension: I forgot to set my server action to run on the server. Outcome: The solution for me was that I forgot to set my server action to run on the server using `use server`.

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TypeScript now compiles test.ts to test.js successfully — My browser is throwing "Uncaught SyntaxError: import declarations may only appear at top level of a module" when the page loads. Outcome: TypeScript now compiles test.ts to test.js successfully. But now I have a different error.

MATCHESSolution

Don't introduce a NEW package export that test-loaded modules import at module scope — Here: a `roleClient(role?)` helper in the consumer package (`etl/llm-route.ts`). Tension: it forces you to update every `vi.mock` factory, and missing one re-breaks CI.

MATCHESSolution

Don't build per-client adapters. — client capabilities change with updates. Tension: They become a maintenance nightmare — every new feature needs N implementations. Outcome: one delivery function that degrades.

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