feat(async-batcher): make result a type parameter

.changeset/blue-lions-bake.md

@@ -0,0 +1,8 @@
+---
+'@tanstack/pacer-devtools': patch
+'@tanstack/react-pacer': patch
+'@tanstack/solid-pacer': patch
+'@tanstack/pacer': patch
+---
+
+feat(async-batcher): make result a type parameter

docs/framework/react/reference/functions/useasyncbatchedcallback.md

@@ -8,10 +8,10 @@ title: useAsyncBatchedCallback
 # Function: useAsyncBatchedCallback()
 
 ```ts
-function useAsyncBatchedCallback<TFn>(fn, options): (...args) => Promise<void>
+function useAsyncBatchedCallback<TValue, TResult>(fn, options): (item) => Promise<void>
 ```
 
-Defined in: [react-pacer/src/async-batcher/useAsyncBatchedCallback.ts:43](https://github.com/TanStack/pacer/blob/main/packages/react-pacer/src/async-batcher/useAsyncBatchedCallback.ts#L43)
+Defined in: [react-pacer/src/async-batcher/useAsyncBatchedCallback.ts:42](https://github.com/TanStack/pacer/blob/main/packages/react-pacer/src/async-batcher/useAsyncBatchedCallback.ts#L42)
 
 A React hook that creates a batched version of an async callback function.
 This hook is a convenient wrapper around the `useAsyncBatcher` hook,
@@ -34,27 +34,29 @@ Consider using the `useAsyncBatcher` hook instead.
 
 ## Type Parameters
 
-• **TFn** *extends* `AnyAsyncFunction`
+• **TValue**
+
+• **TResult**
 
 ## Parameters
 
 ### fn
 
-(`items`) => `Promise`\<`any`\>
+(`items`) => `Promise`\<`TResult`\>
 
 ### options
 
-`AsyncBatcherOptions`\<`Parameters`\<`TFn`\>\[`0`\]\>
+`AsyncBatcherOptions`\<`TValue`, `TResult`\>
 
 ## Returns
 
 `Function`
 
 ### Parameters
 
-#### args
+#### item
 
-...`Parameters`\<`TFn`\>
+`TValue`
 
 ### Returns
 

docs/framework/react/reference/functions/useasyncbatcher.md

@@ -8,10 +8,10 @@ title: useAsyncBatcher
 # Function: useAsyncBatcher()
 
 ```ts
-function useAsyncBatcher<TValue, TSelected>(
+function useAsyncBatcher<TValue, TResult, TSelected>(
    fn, 
    options, 
-selector): ReactAsyncBatcher<TValue, TSelected>
+selector): ReactAsyncBatcher<TValue, TResult, TSelected>
 ```
 
 Defined in: [react-pacer/src/async-batcher/useAsyncBatcher.ts:167](https://github.com/TanStack/pacer/blob/main/packages/react-pacer/src/async-batcher/useAsyncBatcher.ts#L167)
@@ -75,32 +75,34 @@ Available state properties:
 
 • **TValue**
 
+• **TResult**
+
 • **TSelected** = \{\}
 
 ## Parameters
 
 ### fn
 
-(`items`) => `Promise`\<`any`\>
+(`items`) => `Promise`\<`TResult`\>
 
 ### options
 
-`AsyncBatcherOptions`\<`TValue`\> = `{}`
+`AsyncBatcherOptions`\<`TValue`, `TResult`\> = `{}`
 
 ### selector
 
 (`state`) => `TSelected`
 
 ## Returns
 
-[`ReactAsyncBatcher`](../../interfaces/reactasyncbatcher.md)\<`TValue`, `TSelected`\>
+[`ReactAsyncBatcher`](../../interfaces/reactasyncbatcher.md)\<`TValue`, `TResult`, `TSelected`\>
 
 ## Example
 
 ```tsx
 // Basic async batcher for API requests - no reactive state subscriptions
 const asyncBatcher = useAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -109,7 +111,7 @@ const asyncBatcher = useAsyncBatcher(
 
 // Opt-in to re-render when execution state changes (optimized for loading indicators)
 const asyncBatcher = useAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -123,7 +125,7 @@ const asyncBatcher = useAsyncBatcher(
 
 // Opt-in to re-render when results are available (optimized for data display)
 const asyncBatcher = useAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -137,7 +139,7 @@ const asyncBatcher = useAsyncBatcher(
 
 // Opt-in to re-render when error state changes (optimized for error handling)
 const asyncBatcher = useAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -155,7 +157,7 @@ const asyncBatcher = useAsyncBatcher(
 
 // Complete example with all callbacks
 const asyncBatcher = useAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },

docs/framework/react/reference/interfaces/reactasyncbatcher.md

@@ -5,18 +5,20 @@ title: ReactAsyncBatcher
 
 <!-- DO NOT EDIT: this page is autogenerated from the type comments -->
 
-# Interface: ReactAsyncBatcher\<TValue, TSelected\>
+# Interface: ReactAsyncBatcher\<TValue, TResult, TSelected\>
 
 Defined in: [react-pacer/src/async-batcher/useAsyncBatcher.ts:10](https://github.com/TanStack/pacer/blob/main/packages/react-pacer/src/async-batcher/useAsyncBatcher.ts#L10)
 
 ## Extends
 
-- `Omit`\<`AsyncBatcher`\<`TValue`\>, `"store"`\>
+- `Omit`\<`AsyncBatcher`\<`TValue`, `TResult`\>, `"store"`\>
 
 ## Type Parameters
 
 • **TValue**
 
+• **TResult**
+
 • **TSelected** = \{\}
 
 ## Properties
@@ -38,7 +40,7 @@ Use this instead of `batcher.store.state`
 ### ~~store~~
 
 ```ts
-readonly store: Store<Readonly<AsyncBatcherState<TValue>>>;
+readonly store: Store<Readonly<AsyncBatcherState<TValue, TResult>>>;
 ```
 
 Defined in: [react-pacer/src/async-batcher/useAsyncBatcher.ts:23](https://github.com/TanStack/pacer/blob/main/packages/react-pacer/src/async-batcher/useAsyncBatcher.ts#L23)

docs/framework/solid/reference/functions/createasyncbatcher.md

@@ -8,10 +8,10 @@ title: createAsyncBatcher
 # Function: createAsyncBatcher()
 
 ```ts
-function createAsyncBatcher<TValue, TSelected>(
+function createAsyncBatcher<TValue, TResult, TSelected>(
    fn, 
    initialOptions, 
-selector): SolidAsyncBatcher<TValue, TSelected>
+selector): SolidAsyncBatcher<TValue, TResult, TSelected>
 ```
 
 Defined in: [async-batcher/createAsyncBatcher.ts:128](https://github.com/TanStack/pacer/blob/main/packages/solid-pacer/src/async-batcher/createAsyncBatcher.ts#L128)
@@ -71,7 +71,7 @@ Example usage:
 ```tsx
 // Default behavior - no reactive state subscriptions
 const asyncBatcher = createAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -89,7 +89,7 @@ const asyncBatcher = createAsyncBatcher(
 
 // Opt-in to re-render when items or isExecuting changes (optimized for UI updates)
 const asyncBatcher = createAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -99,7 +99,7 @@ const asyncBatcher = createAsyncBatcher(
 
 // Opt-in to re-render when error state changes (optimized for error handling)
 const asyncBatcher = createAsyncBatcher(
-  async (items) => {
+  async (items: Item[]) => {
     const results = await Promise.all(items.map(item => processItem(item)));
     return results;
   },
@@ -121,22 +121,24 @@ const { items, isExecuting } = asyncBatcher.state();
 
 • **TValue**
 
+• **TResult**
+
 • **TSelected** = \{\}
 
 ## Parameters
 
 ### fn
 
-(`items`) => `Promise`\<`any`\>
+(`items`) => `Promise`\<`TResult`\>
 
 ### initialOptions
 
-`AsyncBatcherOptions`\<`TValue`\> = `{}`
+`AsyncBatcherOptions`\<`TValue`, `TResult`\> = `{}`
 
 ### selector
 
 (`state`) => `TSelected`
 
 ## Returns
 
-[`SolidAsyncBatcher`](../../interfaces/solidasyncbatcher.md)\<`TValue`, `TSelected`\>
+[`SolidAsyncBatcher`](../../interfaces/solidasyncbatcher.md)\<`TValue`, `TResult`, `TSelected`\>

docs/framework/solid/reference/interfaces/solidasyncbatcher.md

@@ -5,18 +5,20 @@ title: SolidAsyncBatcher
 
 <!-- DO NOT EDIT: this page is autogenerated from the type comments -->
 
-# Interface: SolidAsyncBatcher\<TValue, TSelected\>
+# Interface: SolidAsyncBatcher\<TValue, TResult, TSelected\>
 
 Defined in: [async-batcher/createAsyncBatcher.ts:10](https://github.com/TanStack/pacer/blob/main/packages/solid-pacer/src/async-batcher/createAsyncBatcher.ts#L10)
 
 ## Extends
 
-- `Omit`\<`AsyncBatcher`\<`TValue`\>, `"store"`\>
+- `Omit`\<`AsyncBatcher`\<`TValue`, `TResult`\>, `"store"`\>
 
 ## Type Parameters
 
 • **TValue**
 
+• **TResult**
+
 • **TSelected** = \{\}
 
 ## Properties
@@ -38,7 +40,7 @@ Use this instead of `batcher.store.state`
 ### ~~store~~
 
 ```ts
-readonly store: Store<Readonly<AsyncBatcherState<TValue>>>;
+readonly store: Store<Readonly<AsyncBatcherState<TValue, TResult>>>;
 ```
 
 Defined in: [async-batcher/createAsyncBatcher.ts:23](https://github.com/TanStack/pacer/blob/main/packages/solid-pacer/src/async-batcher/createAsyncBatcher.ts#L23)

docs/guides/async-batching.md

@@ -26,8 +26,8 @@ The `asyncBatch` function provides a simple way to create an async batching func
 ```ts
 import { asyncBatch } from '@tanstack/pacer'
 
-const processAsyncBatch = asyncBatch<number>(
-  async (items) => {
+const processAsyncBatch = asyncBatch(
+  async (items: number[]) => {
     // Process the batch asynchronously
     const results = await Promise.all(
       items.map(item => processApiCall(item))
@@ -65,8 +65,8 @@ For more control over async batch behavior, use the `AsyncBatcher` class directl
 ```ts
 import { AsyncBatcher } from '@tanstack/pacer'
 
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     // Process the batch asynchronously
     const results = await Promise.all(
       items.map(item => processApiCall(item))
@@ -109,8 +109,8 @@ batcher.start() // Resume processing
 Unlike the synchronous batcher which returns void, the async version allows you to capture and use the return value from your batch function:
 
 ```ts
-const batcher = new AsyncBatcher<string>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: string[]) => {
     const results = await processBatch(items)
     return results
   },
@@ -130,8 +130,8 @@ const batcher = new AsyncBatcher<string>(
 The async batcher provides comprehensive error handling capabilities:
 
 ```ts
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     // This might throw an error
     const results = await riskyBatchOperation(items)
     return results
@@ -164,8 +164,8 @@ const batcher = new AsyncBatcher<number>(
 The async batcher tracks when batches are actively executing:
 
 ```ts
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     console.log('Starting batch execution...')
     const results = await longRunningBatchOperation(items)
     console.log('Batch execution completed')
@@ -196,8 +196,8 @@ The `AsyncBatcher` supports these async-specific callbacks:
 The async batcher provides flexible error handling through the `throwOnError` option:
 
 ```ts
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     // This might throw an error
     throw new Error('Batch processing failed')
   },
@@ -222,8 +222,8 @@ const batcher = new AsyncBatcher<number>(
 Like the synchronous batcher, the async batcher supports dynamic options:
 
 ```ts
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     return await processBatch(items)
   },
   {
@@ -360,8 +360,8 @@ The `AsyncBatcherState` includes:
 The async batcher tracks items that failed during batch processing:
 
 ```ts
-const batcher = new AsyncBatcher<number>(
-  async (items) => {
+const batcher = new AsyncBatcher(
+  async (items: number[]) => {
     // This might fail for some items
     if (items.some(item => item < 0)) {
       throw new Error('Negative numbers not allowed')