types(scroll): allow returning a falsy value to prevent scroll

posva · posva · commit 5118824ece97 · 2019-09-09T10:18:37.000+02:00
Closes #2921
diff --git a/types/router.d.ts b/types/router.d.ts
@@ -74,7 +74,7 @@ export interface RouterOptions {
     to: Route,
     from: Route,
     savedPosition: Position | void
-  ) => PositionResult | Promise<PositionResult>
+  ) => PositionResult | Promise<PositionResult> | undefined | null
 }
 
 type RoutePropsFunction = (route: Route) => Object
