add event mapping type (software-mansion#388)

jordmccord · Sep 21, 2019 · 52ffd70 · 52ffd70
1 parent c3c0d71
commit 52ffd70
Showing 1 changed file with 6 additions and 3 deletions.
diff --git a/react-native-reanimated.d.ts b/react-native-reanimated.d.ts
@@ -253,9 +253,12 @@ declare module 'react-native-reanimated' {
     export function clockRunning(clock: AnimatedClock): AnimatedNode<0 | 1>;
     // the return type for `event` is a lie, but it's the same lie that
     // react-native makes within Animated
-    export function event(
-      argMapping: ReadonlyArray<Mapping>,
-      config?: {},
+    type EventArgFunc<T> = (arg: T) => Node<number>;
+    type EventMapping<T> = T extends object ? { [K in keyof T]?: EventMapping<T[K]> | EventArgFunc<T[K]> } : Adaptable<T> | EventArgFunc<T>;
+    type EventMappingArray<T> = T extends Array<any> ? { [I in keyof T]: EventMapping<T[I]> } : [EventMapping<T>]
+    export function event<T>(
+        argMapping: T extends never ? ReadonlyArray<Mapping> : Readonly<EventMappingArray<T>>,
+        config?: {},
     ): (...args: any[]) => void;
 
     // derived operations