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Graph/cache-directive-placement

AntiPattern

Cache Hook Placement

cache-directive-placement

Cache-scoped directives like "use cache" (and related tag-based caching) must execute at the top of the function body; otherwise caching won’t apply and data will Suspend/fetch on the server instead of hydrating correctly.

Node Details

Public graph metadata

Updated7/10/2026

Connections

30 linked nodes

MATCHESSolution

Refactor so that hooks are called only inside the custom hook or at the component level, and return plain functions that do not call hooks (e.g., compute/set needed state without invoking hooks in the returned callback). Alternatively restructure the custom hook to expose non-hook handlers or move the hook invocation to component initialization and pass the resulting setters.

MATCHESSolution

make sure that the form component is only rendered after data is ready — Decouple the data fetching component from the form component. Tension: background refetches will not be reflected. Outcome: if your cache already has stale data when `App` mounts, you'll get that data in your state.

MATCHESSolution

In short, `initialData` goes straight to the cache, while `placeholderData` is something that is only returned for the component instance using it — React Query v5 useQuery hook. Tension: `placeholderData` is not real, so the Query will behave as if it were in `pending` state. Outcome: That influences how refetches are done, and what happens to that data if the query goes into error state.

MATCHESSolution

I think you can achieve that by using the `ensureQueryData` function. Tension: This way you first check on cache for the given key, and if nothing is found it runs the function and returns the result. Outcome: Another option could be to by making a custom hook use `getQueryData` to read the cache and if nothing is found it will return undefined so you could manage to call to your api.

MATCHESSolution

`use cache` must be placed at the very first line of function body: — export async function getCachedSession(userCacheToken: string, token: string) {. Tension: cacheTag(`user-session:${userCacheToken}`);. Outcome: "use cache"; // First line of function body.

MATCHESSolution

Set `experimental.dynamicIO` to `false` and enable `experimental.useCache: true`; keep cache behavior via the Route Segment Config (e.g., using `export const dynamic = "force-dynamic"`).

MATCHESSolution

Implement a shared, build-time cache (e.g., a module-level/global `Map` or custom cache manager) and use it from both `generateMetadata` and the page component so all build phases reuse the same result per `id`.

MATCHESSolution

Use Next.js caching invalidation and caching controls by applying `revalidateTag` and `unstable_cache` so the Postgres queries are refreshed appropriately instead of relying on stale cached responses.

MATCHESSolution

provided it's called within the same process — workers might be pre-forked. Tension: the cache doesn't work across processes. Outcome: each process got its own cache.

MATCHESSolution

document.getElementById("sentry-script").addEventListener("load", () => { — By using the defer attribute. Outcome: the script will only execute, and Sentry will initialize, once the full Sentry resource has been completely loaded.

MATCHESSolution

This Github Action will help you for that: https://github.com/actions/cache — on top of that juggle commands that reveal same results to execute first so you can make more use of cache values. Outcome: introduce caching.

MATCHESSolution

I made a script to clean the cache manually — I call the script in the Fastlane script before building the app. Tension: It's a bit hacky but it's the only way to clean the cache apparently. Outcome: npm start -- --reset-cache &.

MATCHESSolution

you need to add an `@reference` directive at the top of the file — If you want to use them in other modules or locations. Tension: TailwindCSS directives only in the global CSS file. Outcome: at the top of the file pointing to the main global.css.

MATCHESSolution

Add an attribute in the dataLayer via GTM — Creating a script that is always loaded. Tension: Monitor url changes. Outcome: Check the dataLayer to know if the script needs to be run or not.

MATCHESSolution

Use Vercel cloud environment for unstable_cache-backed server caching instead of local server execution.

MATCHESSolution

in the Developer-Tools the "Disable Cache" in the Network-Tab is NOT checked — locally developing. Tension: otherwise the caching won't work while developing. Outcome: caching won't work while developing.

MATCHESSolution

Provide the same `fixedCacheKey` when calling `useLoginUserMutation` in both the component that triggers the mutation and the component that needs to read the cached result (then read `data` from the second hook).

MATCHESSolution

Call each RTK Query hook with the exact same query arguments (or none, if the endpoint takes none) that the fulfilled requests use, and ensure components read the correct hook data/selector result corresponding to those cache entries.

MATCHESSolution

Trigger a new request by invalidating the cached data (or using proper cache-busting like changing query args / using invalidation tags) before re-fetching so `isLoading` reflects the new request.

MATCHESSolution

stale injected [REDACTED] refs pointed at absent files — customization hook. Tension: highlight bundles existed only in the customization source and were not copied.

MATCHESSolution

Ensure the <script type="importmap"> element is positioned in the document head before any module scripts that import React (place it at the very top of <head>) so the map is applied on every reload.

MATCHESSolution

Call all hooks unconditionally at the top of the component (e.g., move useParams() above the ready/user checks) and only render conditional UI afterward; optionally use nested routes for subpages instead of relying on conditional logic.

MATCHESSolution

Use cache-busting query strings on the remoteEntry URL and avoid caching the remote entry

MATCHESSolution

You can also use a static field to maintain the cached object. — Separate methods can be exposed to client. Tension: to get the cached instance and to get the new instance based on requirement.

MATCHESSolution

set them as cache entries before MakeAvailable — LevelDB cmake file has some options that should help. Tension: unit tests/benchmarks (and their dependencies) won't be ever created as projects. Outcome: set them as cache entries before MakeAvailable.

MATCHESSolution

Outcome: cache.clear().

MATCHESSolution

Universal hook set for MCP behavioral activation. Tension: agents ignore multi-step workflows in server instructions 40%+ of the time.

MATCHESSolution

after each allocation that may trigger GC. Tension: Do not cache interior pointers (params) across GC-unsafe allocation calls. Outcome: Apply same fix pattern to sampled_data_continue.

MATCHESSolution

Cache in OnAwake — Key s&box performance patterns from the optimizer skill:. Tension: GetComponent every frame. Outcome: Physics work in OnFixedUpdate.

MATCHESSolution

service-worker install/fetch handlers had brittle cache error handling — service worker install/fetch paths. Tension: brittle cache error handling. Outcome: tolerant precache and explicit offline responses.

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