Merge pull request #26629 from iRoachie/react-navigation

(react-navigation) Allow setParams to be partial

types/react-navigation/index.d.ts

@@ -576,7 +576,7 @@ export interface NavigationScreenProp<S, P = NavigationParams> {
   closeDrawer: () => any;
   toggleDrawer: () => any;
   getParam: <T extends keyof P>(param: T, fallback?: P[T]) => P[T];
-  setParams: (newParams: P) => boolean;
+  setParams: (newParams: Partial<P>) => boolean;
   addListener: (
     eventName: string,
     callback: NavigationEventCallback

types/react-navigation/react-navigation-tests.tsx

@@ -489,3 +489,28 @@ const CustomHeaderStack = createStackNavigator({
         }
     }
 });
+
+interface ScreenProps {
+    name: string;
+    onPlay(): void;
+}
+
+class SetParamsTest extends React.Component<NavigationScreenProps<ScreenProps>> {
+    componentDidMount() {
+        this.props.navigation.setParams({
+            onPlay: this.onPlay
+        });
+    }
+
+    onPlay = () => {
+        //
+    }
+
+    render() {
+        const name = this.props.navigation.getParam('name');
+
+        return (
+            <Text>My name is {name}</Text>
+        );
+    }
+}