How to hide back button in React- navigation / react - native

In React Native, if you are using the React Navigation library, hiding the back button in the navigation bar is a relatively simple task. This is typically configured within the navigation options of the screen or application.

Steps to Hide the Back Button:

1. Direct Configuration in StackNavigator:

   When setting up a StackNavigator, you can hide the back button by setting headerLeft to null within the navigationOptions of a specific screen. This ensures the back button is not visible on the left side when the page is entered.

   javascript
   import { createStackNavigator } from 'react-navigation-stack';
   
   const Stack = createStackNavigator({
     Home: {
       screen: HomeScreen,
     },
     Details: {
       screen: DetailsScreen,
       navigationOptions: {
         headerLeft: () => null,  // Hide the back button here
       }
     },
   });

2. Dynamically Hiding the Back Button:

   If you need to dynamically hide the back button based on certain conditions, you can achieve this by using the navigation.setOptions method within the component.

   javascript
   function DetailsScreen({ navigation }) {
     useEffect(() => {
       navigation.setOptions({
         headerLeft: () => null
       });
     }, [navigation]);
   
     return (
       <View>
         <Text>Details Screen</Text>
       </View>
     );
   }

Example Explanation:

In the first example provided above, we create a StackNavigator containing two screens: Home and Details. Within the navigation options of the Details screen, we set headerLeft to null, so when navigating to the Details screen, the back button in the top-left corner is not visible.

In the second example, we dynamically set headerLeft to null by calling navigation.setOptions within the component's useEffect. This approach is suitable for scenarios where you need to conditionally hide the back button based on runtime data or state.

Using these methods, you can flexibly control the visibility of the back button in the navigation bar within your React Native application.