feat(query-core): improve useInfiniteQuery error handling

docs/framework/react/reference/useInfiniteQuery.md

@@ -54,7 +54,7 @@ The options for `useInfiniteQuery` are identical to the [`useQuery` hook](../use
 
 **Returns**
 
-The returned properties for `useInfiniteQuery` are identical to the [`useQuery` hook](../useQuery), with the addition of the following and a small difference in `isRefetching`:
+The returned properties for `useInfiniteQuery` are identical to the [`useQuery` hook](../useQuery), with the addition of the following properties and a small difference in `isRefetching` and `isRefetchError`:
 
 - `data.pages: TData[]`
   - Array containing all pages.
@@ -66,19 +66,24 @@ The returned properties for `useInfiniteQuery` are identical to the [`useQuery`
   - Will be `true` while fetching the previous page with `fetchPreviousPage`.
 - `fetchNextPage: (options?: FetchNextPageOptions) => Promise<UseInfiniteQueryResult>`
   - This function allows you to fetch the next "page" of results.
-    `getNextPageParam`.
-  - `options.cancelRefetch: boolean` if set to `true`, calling `fetchNextPage` repeatedly will invoke `fetchPage` every time, whether the previous
+  - `options.cancelRefetch: boolean` if set to `true`, calling `fetchNextPage` repeatedly will invoke `queryFn` every time, whether the previous
     invocation has resolved or not. Also, the result from previous invocations will be ignored. If set to `false`, calling `fetchNextPage`
     repeatedly won't have any effect until the first invocation has resolved. Default is `true`.
 - `fetchPreviousPage: (options?: FetchPreviousPageOptions) => Promise<UseInfiniteQueryResult>`
   - This function allows you to fetch the previous "page" of results.
   - `options.cancelRefetch: boolean` same as for `fetchNextPage`.
 - `hasNextPage: boolean`
-  - This will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
+  - Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
 - `hasPreviousPage: boolean`
-  - This will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
+  - Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
+- `isFetchNextPageError: boolean`
+  - Will be `true` if the query failed while fetching the next page.
+- `isFetchPreviousPageError: boolean`
+  - Will be `true` if the query failed while fetching the previous page.
 - `isRefetching: boolean`
-  - Is `true` whenever a background refetch is in-flight, which _does not_ include initial `pending` or fetching of next or previous page
+  - Will be `true` whenever a background refetch is in-flight, which _does not_ include initial `pending` or fetching of next or previous page
   - Is the same as `isFetching && !isPending && !isFetchingNextPage && !isFetchingPreviousPage`
+- `isRefetchError: boolean`
+  - Will be `true` if the query failed while refetching a page.
 
 Keep in mind that imperative fetch calls, such as `fetchNextPage`, may interfere with the default refetch behaviour, resulting in outdated data. Make sure to call these functions only in response to user actions, or add conditions like `hasNextPage && !isFetching`.

packages/query-core/src/__tests__/infiniteQueryObserver.test-d.tsx

@@ -51,6 +51,8 @@ describe('InfiniteQueryObserver', () => {
       expectTypeOf(result.data).toEqualTypeOf<InfiniteData<string, unknown>>()
       expectTypeOf(result.error).toEqualTypeOf<Error>()
       expectTypeOf(result.status).toEqualTypeOf<'error'>()
+      expectTypeOf(result.isFetchNextPageError).toEqualTypeOf<false>()
+      expectTypeOf(result.isFetchPreviousPageError).toEqualTypeOf<false>()
     }
 
     if (result.isSuccess) {

packages/query-core/src/infiniteQueryObserver.ts

@@ -10,6 +10,7 @@ import type {
   FetchNextPageOptions,
   FetchPreviousPageOptions,
   InfiniteData,
+  InfiniteQueryObserverBaseResult,
   InfiniteQueryObserverOptions,
   InfiniteQueryObserverResult,
   QueryKey,
@@ -145,26 +146,33 @@ export class InfiniteQueryObserver<
     >,
   ): InfiniteQueryObserverResult<TData, TError> {
     const { state } = query
-    const result = super.createResult(query, options)
+    const parentResult = super.createResult(query, options)
 
-    const { isFetching, isRefetching } = result
+    const { isFetching, isRefetching, isError, isRefetchError } = parentResult
+    const fetchDirection = state.fetchMeta?.fetchMore?.direction
 
-    const isFetchingNextPage =
-      isFetching && state.fetchMeta?.fetchMore?.direction === 'forward'
+    const isFetchNextPageError = isError && fetchDirection === 'forward'
+    const isFetchingNextPage = isFetching && fetchDirection === 'forward'
 
-    const isFetchingPreviousPage =
-      isFetching && state.fetchMeta?.fetchMore?.direction === 'backward'
+    const isFetchPreviousPageError = isError && fetchDirection === 'backward'
+    const isFetchingPreviousPage = isFetching && fetchDirection === 'backward'
 
-    return {
-      ...result,
+    const result: InfiniteQueryObserverBaseResult<TData, TError> = {
+      ...parentResult,
       fetchNextPage: this.fetchNextPage,
       fetchPreviousPage: this.fetchPreviousPage,
       hasNextPage: hasNextPage(options, state.data),
       hasPreviousPage: hasPreviousPage(options, state.data),
+      isFetchNextPageError,
       isFetchingNextPage,
+      isFetchPreviousPageError,
       isFetchingPreviousPage,
+      isRefetchError:
+        isRefetchError && !isFetchNextPageError && !isFetchPreviousPageError,
       isRefetching:
         isRefetching && !isFetchingNextPage && !isFetchingPreviousPage,
     }
+
+    return result as InfiniteQueryObserverResult<TData, TError>
   }
 }

packages/query-core/src/types.ts

@@ -473,6 +473,13 @@ export interface ResultOptions {
 }
 
 export interface RefetchOptions extends ResultOptions {
+  /**
+   * If set to `true`, a currently running request will be cancelled before a new request is made
+   *
+   * If set to `false`, no refetch will be made if there is already a request running.
+   *
+   * Defaults to `true`.
+   */
   cancelRefetch?: boolean
 }
 
@@ -486,10 +493,26 @@ export interface InvalidateOptions extends RefetchOptions {}
 export interface ResetOptions extends RefetchOptions {}
 
 export interface FetchNextPageOptions extends ResultOptions {
+  /**
+   * If set to `true`, calling `fetchNextPage` repeatedly will invoke `queryFn` every time,
+   * whether the previous invocation has resolved or not. Also, the result from previous invocations will be ignored.
+   *
+   * If set to `false`, calling `fetchNextPage` repeatedly won't have any effect until the first invocation has resolved.
+   *
+   * Defaults to `true`.
+   */
   cancelRefetch?: boolean
 }
 
 export interface FetchPreviousPageOptions extends ResultOptions {
+  /**
+   * If set to `true`, calling `fetchPreviousPage` repeatedly will invoke `queryFn` every time,
+   * whether the previous invocation has resolved or not. Also, the result from previous invocations will be ignored.
+   *
+   * If set to `false`, calling `fetchPreviousPage` repeatedly won't have any effect until the first invocation has resolved.
+   *
+   * Defaults to `true`.
+   */
   cancelRefetch?: boolean
 }
 
@@ -712,15 +735,41 @@ export interface InfiniteQueryObserverBaseResult<
   TData = unknown,
   TError = DefaultError,
 > extends QueryObserverBaseResult<TData, TError> {
+  /**
+   * This function allows you to fetch the next "page" of results.
+   */
   fetchNextPage: (
     options?: FetchNextPageOptions,
   ) => Promise<InfiniteQueryObserverResult<TData, TError>>
+  /**
+   * This function allows you to fetch the previous "page" of results.
+   */
   fetchPreviousPage: (
     options?: FetchPreviousPageOptions,
   ) => Promise<InfiniteQueryObserverResult<TData, TError>>
+  /**
+   * Will be `true` if there is a next page to be fetched (known via the `getNextPageParam` option).
+   */
   hasNextPage: boolean
+  /**
+   * Will be `true` if there is a previous page to be fetched (known via the `getPreviousPageParam` option).
+   */
   hasPreviousPage: boolean
+  /**
+   * Will be `true` if the query failed while fetching the next page.
+   */
+  isFetchNextPageError: boolean
+  /**
+   * Will be `true` while fetching the next page with `fetchNextPage`.
+   */
   isFetchingNextPage: boolean
+  /**
+   * Will be `true` if the query failed while fetching the previous page.
+   */
+  isFetchPreviousPageError: boolean
+  /**
+   * Will be `true` while fetching the previous page with `fetchPreviousPage`.
+   */
   isFetchingPreviousPage: boolean
 }
 
@@ -734,6 +783,8 @@ export interface InfiniteQueryObserverPendingResult<
   isPending: true
   isLoadingError: false
   isRefetchError: false
+  isFetchNextPageError: false
+  isFetchPreviousPageError: false
   isSuccess: false
   status: 'pending'
 }
@@ -749,6 +800,8 @@ export interface InfiniteQueryObserverLoadingResult<
   isLoading: true
   isLoadingError: false
   isRefetchError: false
+  isFetchNextPageError: false
+  isFetchPreviousPageError: false
   isSuccess: false
   status: 'pending'
 }
@@ -764,6 +817,8 @@ export interface InfiniteQueryObserverLoadingErrorResult<
   isLoading: false
   isLoadingError: true
   isRefetchError: false
+  isFetchNextPageError: false
+  isFetchPreviousPageError: false
   isSuccess: false
   status: 'error'
 }
@@ -779,6 +834,8 @@ export interface InfiniteQueryObserverRefetchErrorResult<
   isLoading: false
   isLoadingError: false
   isRefetchError: true
+  isFetchNextPageError: false
+  isFetchPreviousPageError: false
   isSuccess: false
   status: 'error'
 }
@@ -794,6 +851,8 @@ export interface InfiniteQueryObserverSuccessResult<
   isLoading: false
   isLoadingError: false
   isRefetchError: false
+  isFetchNextPageError: false
+  isFetchPreviousPageError: false
   isSuccess: true
   status: 'success'
 }