return type void to undefined

eomttt · eomttt · commit 01d2f2dc7f46 · 2021-04-06T11:43:10.000+09:00
diff --git a/src/core/types.ts b/src/core/types.ts
@@ -472,7 +472,7 @@ export interface MutationOptions<
   mutationFn?: MutationFunction<TData, TVariables>
   mutationKey?: MutationKey
   variables?: TVariables
-  onMutate?: (variables: TVariables) => Promise<TContext> | TContext | void
+  onMutate?: (variables: TVariables) => Promise<TContext> | TContext | undefined
   onSuccess?: (
     data: TData,
     variables: TVariables,
diff --git a/src/react/types.ts b/src/react/types.ts
@@ -75,7 +75,7 @@ export interface UseMutationOptions<
   TContext = unknown
 > {
   mutationKey?: string | unknown[]
-  onMutate?: (variables: TVariables) => Promise<TContext> | TContext | void
+  onMutate?: (variables: TVariables) => Promise<TContext> | TContext | undefined
   onSuccess?: (
     data: TData,
     variables: TVariables,
