docs(preact-query): improve JSDoc examples across hooks and options factories - #11301
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Included review availability: Your plan provides up to 10 included reviews per hour; 9 remain after this review. 📝 WalkthroughWalkthroughThe PR updates Preact documentation examples and source references. Examples now use complete components, current hook patterns, optional data access, filtered status indicators, mutation rendering, and combined query state handling. Runtime implementations remain unchanged. ChangesPreact documentation examples
Estimated code review effort: 2 (Simple) | ~10 minutes Merge Risk: ⚪ Minimal · up to This change makes documentation examples runnable and consistent without changing published behavior; no actionable merge-blocking risk remains beyond normal checks and review. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 3 functions across 7 files. (1 skipped: 1 unsupported.) Full details: Description checkExplanation The description is complete and directly aligned with the changes. It explains the motivation, lists the affected examples and documentation updates, confirms testing, confirms AI-assisted code review, and identifies the change as documentation-only with no release impact. ✨ Finishing Touches📝 Generate docstrings
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Inline comments:
In `@packages/preact-query/src/useMutationState.ts`:
- Around line 124-132: The saved-posts useMutationState example should count
only completed successful mutations. In
packages/preact-query/src/useMutationState.ts lines 124-132, add a
success-status filter alongside the mutation key; apply the same correction to
docs/framework/preact/reference/functions/useMutationState.md lines 77-85 so the
generated reference matches.
- Around line 28-29: Update the useIsMutating example wording from “fetching” to
“in progress” in packages/preact-query/src/useMutationState.ts at lines 28-29,
then regenerate docs/framework/preact/reference/functions/useIsMutating.md at
lines 42-43 so the reference example matches the corrected terminology.
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📒 Files selected for processing (11)
docs/framework/preact/reference/functions/infiniteQueryOptions.mddocs/framework/preact/reference/functions/queryOptions.mddocs/framework/preact/reference/functions/useIsFetching.mddocs/framework/preact/reference/functions/useIsMutating.mddocs/framework/preact/reference/functions/useMutationState.mddocs/framework/preact/reference/functions/useQueries.mdpackages/preact-query/src/infiniteQueryOptions.tspackages/preact-query/src/queryOptions.tspackages/preact-query/src/useIsFetching.tspackages/preact-query/src/useMutationState.tspackages/preact-query/src/useQueries.ts
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…'infiniteQueryOptions' example
… status in 'useMutationState' examples
…ueryOptions' example
…utationState' example
…ult' in 'useMutation' Promise.allSettled example
…ionState' example
…tes in 'useInfiniteQuery' examples
…ead of flat '<p>' tags
…ated 'Elsewhere' comment in 'queryOptions'/'infiniteQueryOptions' examples
…'infiniteQueryOptions' to 'useQuery'/'useInfiniteQuery'
…efined refs across remaining hooks
…ueryOptions' examples instead of an unexplained literal
…inite-query 'skipToken' examples
… 'queryOptions'/'useQuery'/'infiniteQueryOptions'/'useInfiniteQuery' examples
…e errors instead of hiding it
…ery' examples, add a 'fetchNextPage' trigger to 'infiniteQueryOptions'
…tching', move cross-reference out of '@example'
…'/'infiniteQueryOptions' into their hooks
…tationOptions', trim boilerplate '@remarks'
…nk 'useSuspenseInfiniteQuery' to 'useInfiniteQuery' and document its waterfall/refetch risks
…om 'useSuspenseInfiniteQuery' waterfall remark
…ationOptions' with its 'mutationKey' lookup benefit
…ds for consistency with other examples
🎯 Changes
Swept every
@exampleblock across preact-query's hooks and options factories. Eleven kinds of issues, all interrelated since fixing one often touched the same block as another:1. Examples that weren't runnable code
Several
@exampleblocks called hooks or referenced options factories outside of a component — invalid code, since hooks can only be called inside a component. Wrapped every remaining example in a function component:useIsFetching.ts: first example called the hook at module scope.useQueries.ts: both examples called the hook at module scope. Also addedisErrorhandling to both (previously only the loading/success states were shown), fixed a missingkeyin the per-item render branch, and renamedcombine'sresultsparameter topostQueriesfor consistency with the first example's variable name (following the same reasoning as docs(preact-query): rename 'results' to 'postQueries' in 'useSuspenseQueries' example #11299).useMutationState.ts(coversuseIsMutatingtoo): all four examples called the hooks at module scope. Also filtered bystatus: 'success'where the example readsmutation.state.data, and renamed variables (data→savedPosts,variables→pendingVariables,latest→latestSavedPost) introduced by the componentization to match what they hold.queryOptions.ts: two of the three examples only defined the options factory without a consuming component. For the "works with every API" example, dropped theuseSuspenseQuerycall rather than cramming two Suspense-incompatible hooks into one component — the imperative-API calls (queryClient.query,getQueryData) already carry that part of the point.infiniteQueryOptions.ts: the base example only defined the options factory without a consuming component.useInfiniteQuery.ts: both examples only showed afetchNextPagetrigger without rendering fetched pages or handling loading/error states — addedisPending/isErrorhandling and rendereddata.pages, matching theisErrorhandling added touseQueries.ts.2. List examples rendered as flat, unstructured markup
data.map(...)results were rendered as bare<p key={...}>tags with no wrapping element — not representative of a real list UI. Changed every such example acrossqueryOptions.ts,infiniteQueryOptions.ts,useQuery.ts,useInfiniteQuery.ts,useSuspenseQuery.ts, anduseSuspenseInfiniteQuery.tsto wrap items in<ul>/<li>. Also replaced an undefined<Spinner />reference inuseSuspenseQuery.tswith the loading-text convention already used elsewhere (useQuery.ts), and replaced two undefined variable references (id,postIdused outside the component that scoped them) inqueryOptions.ts/infiniteQueryOptions.ts's imperative-call snippets with literal values.3. Prefetch examples with an unlocated call site
queryOptions.ts/infiniteQueryOptions.tshad examples showingqueryClient.query(...)/queryClient.infiniteQuery(...)right after a component definition, introduced only by a// Elsewhere, e.g. to warm the cache before rendering <X>comment — the call looked attached to the component but nothing showed where it actually runs. Moved the "parameterized factory" examples' prefetch call intouseQuery.ts/useInfiniteQuery.tsas a new@example, showing a concrete call site: a sibling link component that warms the cacheonMouseEnter.queryOptions.ts/infiniteQueryOptions.tsnow just show the options object working with the imperative API, with a pointer to the hook's file for the full scenario.4. Missing
skipTokencoverageuseQuery,queryOptions,useInfiniteQuery, andinfiniteQueryOptionseach have a catch-all overload (UseQueryOptions/UndefinedInitialDataOptions/UndefinedInitialDataInfiniteOptions) that's the only one of the three permittingqueryFn: skipToken— but none of them had an example showing it, despite the docs guide (disabling-queries.md) recommendingskipTokenoverenabled: falsefor type-safe conditional disabling. Added askipTokenexample to each file's catch-all overload, following the samepostId != null ? () => fetchPost(postId) : skipTokenpattern the guide uses. Since the query is conditionally disabled, these examples checkisLoadingrather thanisPending—isFetchingisfalsewhile disabled, soisLoading(isPending && isFetching) doesn't show a stale loading state;isPendingalone would. Verified each example compiles under the package's owntsconfig(via a throwaway file insrc/, removed after) before committing, since TypeScript overload resolution means a wrong choice of which options type getsskipTokensilently fails to typecheck as an example rather than as a build error.5. Missing
isPending/isErrorhandling inqueryOptions.ts,infiniteQueryOptions.ts,useQuery.ts, anduseInfiniteQuery.tsSeveral examples across these four files read
datawithout first branching onisPending/isError(orstatus), which either doesn't typecheck without an extra?./.mismatch or silently rendersundefined. Audited every example in these four files and added the missing branches:isPendingbefore accessingdata, narrowing it to non-undefinedwithout an optional chain.useQuery.ts's cache-seeding, paginated, and hover-prefetch examples) were left as-is — showing data immediately, without a loading state, is the point of those examples, not an oversight.initialDataexamples (queryOptions.ts,infiniteQueryOptions.ts,useInfiniteQuery.ts) needed a different fix: these overloads exist specifically sodatastays defined even if a refetch fails, so anisErrorearly return that replaced the list with an error message was undermining the overload's own point. Changed these three to render the list and the error side by side instead.6.
useInfiniteQueryexamples used a "Load More" button, not infinite scrolluseInfiniteQuery.ts's base examples fetched the next page from anonClickhandler only — a "Load More" button pattern, not the "infinite scroll" the hook's name and the docs guide (infinite-queries.md) both describe. Added a second example to each overload that fetches the next page automatically as the user scrolls, using anIntersectionObserveron a sentinel element after the list, guarded onhasNextPage && !isFetchingper the file's own@remarks(callingfetchNextPagewithout that guard risks overwriting an in-flight refetch — the exact case the guide's own scroll example guards against). Separately,infiniteQueryOptions.ts's three base examples had no page-fetching trigger at all — just a static render of the first page — so the hook's defining behavior (accumulating pages) never actually showed. This was folded into section 7 below once it became clear the button example belonged inuseInfiniteQuery.tsalongside the scroll version, not duplicated intoinfiniteQueryOptions.ts.7. Duplicated usage examples between
queryOptions.ts/infiniteQueryOptions.tsand their hooksqueryOptions.tsandinfiniteQueryOptions.tshad grown examples that were really about using a query — basic fetch/loading/error handling,skipToken— duplicated near-verbatim fromuseQuery.ts/useInfiniteQuery.ts. That duplication meant two places to keep in sync, and buried the one thing these two files actually exist to demonstrate: aqueryOptions/infiniteQueryOptionsfactory can be shared between a hook and imperative APIs likequeryClient.query/queryClient.infiniteQuery.Removed the duplicated examples and kept only the ones that exercise that factory-sharing behavior (the parameterized-factory example and, on
queryOptions.ts, the "works with every API" example), pointing to the hook file via@remarksfor everything else. One exception:queryOptions.ts's catch-all overload keeps itsskipTokenexample, since it's the only overload wherequeryFn: skipTokentypechecks onqueryOptionsitself — that's a type-level fact theuseQuery.tsskipTokenexample (which callsuseQuerydirectly, notqueryOptions) doesn't prove.infiniteQueryOptions.ts's base "Load More" button example, previously the only place with a page-fetching trigger, moved touseInfiniteQuery.tsas a second example alongside the scroll-triggered one, since a working query needs at least one hook example that actually fetches a next page.8. Same duplication in
mutationOptions.ts, plus boilerplate@remarksmutationOptions.ts'smutationKey-required overload had the same problem as section 7: a basicmutate-call example duplicated near-verbatim fromuseMutation.ts. Removed it and kept only the overload's genuinely unique example — looking a mutation up elsewhere via itsmutationKey(e.g. for a global "saving…" indicator), which only this overload's type allows. The other overload (nomutationKey) keeps its basic example, sinceuseMutation.tsnever callsmutationOptions()itself — that overload's example is the only place in the package showingmutationOptions()called without amutationKey, so it's not a duplicate despite looking similar touseMutation.ts's examples.While doing this pass, also trimmed
@remarkstext added in section 7 that had drifted into boilerplate — several of the new@remarksopened with a generic "seeuseQuery/useMutationfor usage patterns" sentence that just repeated what the adjacent@seetag already said (both render as separate sections in the generated docs, so the repetition was visible, not just redundant source). Kept only the overload-specific half of each@remarks(e.g. "this is the only overload that acceptsqueryFn: skipToken").9. Suspense hooks: a missing example, an under-documented risk, and a stray cross-reference
Auditing the three Suspense hooks (
useSuspenseQuery,useSuspenseInfiniteQuery,useSuspenseQueries) against each other surfaced three gaps:useSuspenseQueries.ts's first overload (the one that acceptscombine) had no example actually usingcombine— its two examples were identical to the second overload's, which doesn't acceptcombineat all. Added a third example demonstratingcombine, noting it's the only overload that accepts it.useSuspenseInfiniteQuery.tshad none ofuseInfiniteQuery.ts's warnings about imperativefetchNextPagecalls interfering with refetching, and no@seeback to the non-Suspense hook, even though its own examples callfetchNextPage. Added both, plus a@remarksabout the same request-waterfall riskuseSuspenseQuery.tsdocuments for serial Suspense calls.@remarksinitially pointed atuseSuspenseQueriesas a workaround, copyinguseSuspenseQuery.ts's wording — butuseSuspenseQueries'squeriesarray only acceptsUseSuspenseQueryOptions, notUseSuspenseInfiniteQueryOptions, so it can't actually parallelize infinite queries. Removed the reference; the remark now just states there's no way to parallelize multiple infinite queries under Suspense, without pointing at an API that can't do it.Regenerated the corresponding reference docs with
pnpm run generate-docs.10.
@seepointer tomutationOptionsundersold the factoryConsidered (and rejected, after checking with the reviewer) converting every hook example to call its options factory instead of passing an inline object — sections 7-8 deliberately kept most hook examples inline, using the factory only where sharing a cache entry with an imperative call is the actual point, so a blanket conversion would erase that signal and reintroduce the duplication those sections just removed. Scoped down to checking whether each
@see {@link queryOptions|infiniteQueryOptions|mutationOptions}pointer states a real benefit or just names the function.useQuery.ts/useInfiniteQuery.ts's wording already does ("to share these options betweenuseQueryand imperative APIs likequeryClient.query");useMutation.ts's was weaker ("to share these options across multipleuseMutationcall sites"), so added the benefitmutationOptions.ts's remaining example actually demonstrates — looking a mutation up elsewhere via itsmutationKey.11. Inconsistent blank-line spacing around
isPending/isErrorguardsA handful of
Comments/Postexamples inqueryOptions.ts,infiniteQueryOptions.ts, anduseInfiniteQuery.tspacked the hook call, both guardifstatements, and thereturnonto consecutive lines with no blank line between them, while every other example in the same files (and the same file, inqueryOptions.ts's case) separates those three groups with a blank line. Added the blank lines for consistency — no logic change.Out of scope for all of the above but included in this PR:
useMutation.ts's existingPromise.allSettledexample (already inside a component) had itsresults/resultvariables renamed toaddResults/addResult, since the surroundinguseMutationState.tsexamples were being renamed in the same pass for the same reason (matching what the variable holds).✅ Checklist
pnpm run test:pr, or these tests do not apply to this pull request.🚀 Release Impact