Add strong typing to respond to navigation pads

Question

I use typescript in my reaction project (expo).

The project uses interactive navigation, so on my screens I can install navigationOptions, and I have access to prop navigation.

Now I'm trying to type them a lot to get hints about what properties are available for installation.

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 reaction-navigation as a props for components.

Answer 1

Just add NavigationType to your details, for example:

    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>
        );
      }
    }

Answer 2

It works:

static navigationOptions = ({ navigation }: NavigationScreenProps) => ({
  ...
})

Answer 3

, :

import * as React from 'react'
import { NavigationScreenProps, NavigationStackScreenOptions } from 'react-navigation'

interface NavStateParams {
  someValue: string
}

// tslint:disable-next-line:no-any
type NavigationOptionsFn<TParams=any> = (props: NavigationScreenProps<TParams>) => NavigationStackScreenOptions

class Screen extends React.Component {
  // This should works fine
  static navigationOptions: NavigationOptionsFn<NavStateParams> = ({ navigation, screenProps }) => ({
    title: navigation.state.params.someValue
  })
}

NavigationOptionsFn<TParams> d.ts, .

Answer 4

 yarn add --dev @types/jest @types/react-navigation

import { NavigationScreenProps } from "react-navigation";

export interface ISignInProps extends NavigationScreenProps<{}> { userStore: IUserStore }

export class SignInScreen extends React.Component { .... }

Answer 5

public static navigationOptions: NavigationScreenConfig<NavigationStackScreenOptions> = 
    ({navigation}) => ({/* Your options... */})

Answer 6

, (: ), Props NavigationScreenProp.

, eslint .

import { StackNavigator, NavigationScreenProp } from 'react-navigation';

export interface HomeScreenProps extends NavigationScreenProp {
/* your custom props here */
};

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>
    );
  }
}

Answer 7

:

public static navigationOptions: NavigationScreenOptionsGetter<
  NavigationScreenOptions
> = (navigation, stateProps) => ({
  title: navigation.state.params.someValue,
});

Answer 8

does not work , tsconfig.json "strictNullChecks": true. ,

navigation.state.params.someValue

params . , , , , :

title: navigation.state.params && navigation.state.params.someValue || 'Default title'

Answer 9

- NavigationScreenProps, navigationOptions .. :

interface Props extends NavigationScreenProps {
  someProp: string;
  anotherProp: string;
}

export const SomeGreatScreen: NavigationScreenComponent<NavigationParams, {}, Props> = ({
  someProp,
  anotherProp,
}) => {
...
};

, NavigationScreenComponent<Props> { someProp, anotherProp }, , NavigationScreenComponent<NavigationParams, {}, Props> . -, :

  export type NavigationScreenComponent<
    Params = NavigationParams,
    Options = {},
    Props = {}
  > = React.ComponentType<NavigationScreenProps<Params, Options> & Props> & {
    navigationOptions?: NavigationScreenConfig<Options>;
  };

from react-navigation.d.ts