TanStack
Read the reference matched by the API or behavior being changed. Load adjacent references only for concerns the change crosses; reuse relevant context already read.
Branches
| When you are… | Reference |
|---|---|
| Defining or changing query keys / factories | references/query-keys.md |
| Setting staleTime, gcTime, invalidation, placeholder/initial data | references/query-caching.md |
| Writing mutations, optimistic updates, or mutation state | references/query-mutations.md |
| Prefetching, parallel queries, infinite queries, or cancellation | references/query-fetch-patterns.md |
| SSR dehydrate/hydrate, offline networkMode, or query persistence | references/query-ssr-offline.md |
| Query error boundaries or select/performance | references/query-errors-performance.md |
Registering the router, from typing, virtual routes, or router defaults | references/router-type-and-org.md |
| Route loaders, ensureQueryData, or parallel route loading | references/router-data-loading.md |
| Search params, Link/navigate, route masks, or preload | references/router-search-nav.md |
| Lazy routes, not-found, route context, or auth beforeLoad | references/router-split-errors-context.md |
| TanStack Form hooks, Zod validators, or field components | references/form.md |
Apply the technical rules relevant to the changed behavior.
Tripwires
Query — array keys that include every dependency; reconcile mutations through canonical keys: update from authoritative responses or invalidate when the owning read model requires a server reread; optimistic cache writes need rollback; never put non-serializable values in keys.
Router — register the router type; validate search with defaults (.catch()); use ensureQueryData in loaders when pairing with Query; throw redirect(...) not return.
Form — complete defaultValues for inference; Zod at form/field level; debounce async validators to fit endpoint cost and interaction needs; role="alert" on field errors; preventDefault on submit.