feat(svelte-query): create createPrefetchQuery and createPrefetchInfiniteQuery functions

packages/svelte-query/src/createPrefetchInfiniteQuery.ts

@@ -0,0 +1,24 @@
+import { useQueryClient } from "./useQueryClient.js";
+import type { DefaultError, FetchInfiniteQueryOptions, QueryKey } from "@tanstack/query-core";
+
+export function createPrefetchInfiniteQuery<
+  TQueryFnData = unknown,
+  TError = DefaultError,
+  TData = TQueryFnData,
+  TQueryKey extends QueryKey = QueryKey,
+  TPageParam = unknown,
+>(
+  options: FetchInfiniteQueryOptions<
+    TQueryFnData,
+    TError,
+    TData,
+    TQueryKey,
+    TPageParam
+  >,
+) {
+  const queryClient = useQueryClient()
+
+  if (!queryClient.getQueryState(options.queryKey)) {
+    queryClient.prefetchInfiniteQuery(options)
+  }
+}

packages/svelte-query/src/createPrefetchQuery.ts

@@ -0,0 +1,15 @@
+import { useQueryClient } from "./useQueryClient.js";
+import type { DefaultError, FetchQueryOptions, QueryKey } from "@tanstack/query-core";
+
+export function createPrefetchQuery<
+  TQueryFnData = unknown,
+  TError = DefaultError,
+  TData = TQueryFnData,
+  TQueryKey extends QueryKey = QueryKey,
+>(options: FetchQueryOptions<TQueryFnData, TError, TData, TQueryKey>) {
+  const queryClient = useQueryClient()
+
+  if (!queryClient.getQueryState(options.queryKey)) {
+    queryClient.prefetchQuery(options)
+  }
+}

packages/svelte-query/src/index.ts

@@ -8,6 +8,7 @@ export * from './types.js'
 export * from './context.js'
 
 export { createQuery } from './createQuery.js'
+export { createPrefetchQuery } from './createPrefetchQuery.js'
 export type { QueriesResults, QueriesOptions } from './createQueries.js'
 export type {
   DefinedInitialDataOptions,
@@ -16,6 +17,7 @@ export type {
 export { queryOptions } from './queryOptions.js'
 export { createQueries } from './createQueries.js'
 export { createInfiniteQuery } from './createInfiniteQuery.js'
+export { createPrefetchInfiniteQuery } from './createPrefetchInfiniteQuery.js'
 export { infiniteQueryOptions } from './infiniteQueryOptions.js'
 export { createMutation } from './createMutation.js'
 export { useMutationState } from './useMutationState.js'