typescriptreact-nativereact-navigation

Add strong typing for react navigation props


I'm using typescript in my react-native project(expo).

The project uses react-navigation, so on my screens I can set navigationOptions and I have access to the prop navigation.

Now I'm trying to strongly type these so I get hints for what properties are available to set.

interface NavStateParams {
    someValue: string
}

interface Props extends NavigationScreenProps<NavStateParams> {
   color: string
}

class Screen extends React.Component<Props, any> {
    // This works fine
    static navigationOptions: NavigationStackScreenOptions = {
        title: 'ScreenTitle'
    }
    // Does not work
    static navigationOptions: NavigationStackScreenOptions = ({navigation, screenProps }) => ({
        title: navigation.state.params.someValue
    })
}

What would be the best way to handle react-navigation as props for components.


Solution

  • Just add NavigationType to your Props, like this:

        import { StackNavigator, NavigationScreenProp } from 'react-navigation';
    
        export interface HomeScreenProps {
          navigation: NavigationScreenProp<any,any>
        };
    
        export class HomeScreen extends React.Component<HomeScreenProps, object> {
    
          render() {
            return (
              <View style={styles.container}>       
                <Button
                  title="Go to Details"
                  onPress={() => this.props.navigation.navigate('Details')}
                />
              </View>
            );
          }
        }