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---
id: createMutation
title: createMutation
---
# Function: createMutation()
```ts
function createMutation<TData, TError, TVariables, TContext>(
options,
queryClient?,
): CreateMutationResult<TData, TError, TVariables, TContext>
```
## Type Parameters
• **TData** = `unknown`
• **TError** = `Error`
• **TVariables** = `void`
• **TContext** = `unknown`
## Parameters
### options
[`StoreOrVal`](../../type-aliases/storeorval.md)\<[`CreateMutationOptions`](../../type-aliases/createmutationoptions.md)\<`TData`, `TError`, `TVariables`, `TContext`\>\>
### queryClient?
`QueryClient`
## Returns
[`CreateMutationResult`](../../type-aliases/createmutationresult.md)\<`TData`, `TError`, `TVariables`, `TContext`\>
## Defined in
[packages/svelte-query/src/createMutation.ts:13](https://github.com/TanStack/query/blob/main/packages/svelte-query/src/createMutation.ts#L13)
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