#248 Add union overload to ThunkDispatch (#255)

* #248 Add union overload to ThunkDispatch See discussion in #248 and microsoft/TypeScript#14107. Without this explicit overload, TypeScript is unable to figure out that the function can be called with an argument of type `T|ThunkAction<...>`. * Merge ThunkDispatch union overload with renamed type parameters Co-Authored-By: Tim Dorr <[email protected]>
MiyamotoSatoshi · Jul 6, 2019 · 464b61d · 464b61d
1 parent 04f9437
commit 464b61d
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/index.d.ts b/index.d.ts
@@ -26,6 +26,12 @@ export interface ThunkDispatch<
     thunkAction: ThunkAction<TReturnType, TState, TExtraThunkArg, TBasicAction>
   ): TReturnType;
   <A extends TBasicAction>(action: A): A;
+  // This overload is the union of the two above (see TS issue #14107).
+  <TReturnType, TAction extends TBasicAction>(
+    action:
+      | TAction
+      | ThunkAction<TReturnType, TState, TExtraThunkArg, TBasicAction>
+  ): TAction | TReturnType;
 }
 
 /**