# UpdaterFn

# Type Alias: UpdaterFn()\<TInput, TOutput\>

```ts
type UpdaterFn<TInput, TOutput> = (input) => TOutput;
```

Defined in: [packages/form-core/src/utils.ts:13](https://github.com/TanStack/form/blob/main/packages/form-core/src/utils.ts#L13)

## Type Parameters

### TInput

`TInput`

### TOutput

`TOutput` = `TInput`

## Parameters

### input

`TInput`

## Returns

`TOutput`