undefined is not an object evaluating this props navigation navigate react native with examples

Introduction:

React Native is a popular framework used for building cross-platform mobile applications. It uses JavaScript as the primary programming language and allows developers to create native mobile apps for Android and iOS platforms. One of the key features of React Native is its ability to navigate between different screens in an application. The navigation prop is used to perform navigation actions in React Native. However, at times, developers may encounter an error that says "undefined is not an object evaluating this.props.navigation.navigate." In this article, we will look into the reasons for this error and how to resolve it.

What causes the error "undefined is not an object evaluating this.props.navigation.navigate"?

This error occurs when the navigation prop is not passed to the component. The navigation prop is an object that is passed down to a component from the React Navigation library. It provides the component with various navigation functions such as navigate, goBack, etc. If the navigation prop is not passed to the component, then it will not be able to access the navigation functions, leading to the error.

Another reason for this error could be that the component is not a child of a React Navigation component. React Navigation components such as StackNavigator and TabNavigator pass the navigation prop to their child components. If the component is not a child of a React Navigation component, then it will not receive the navigation prop, resulting in the error.

How to resolve the error "undefined is not an object evaluating this.props.navigation.navigate"?

There are two ways to resolve this error:

Pass the navigation prop to the component:

If the component is a child of a React Navigation component, then it is important to make sure that the navigation prop is passed to it. This can be done by using the withNavigation higher-order component provided by the React Navigation library. The withNavigation HOC wraps the component and passes the navigation prop to it.

Here is an example:

import { withNavigation } from 'react-navigation';

class MyComponent extends React.Component {
  render() {
    return (
      <View>
        <Text onPress={() => this.props.navigation.navigate('SomeRoute')}>
          Go to SomeRoute
        </Text>
      </View>
    );
  }
}

export default withNavigation(MyComponent);

Wrap the component with a React Navigation component:

If the component is not a child of a React Navigation component, then it needs to be wrapped with a React Navigation component such as StackNavigator or TabNavigator. This will ensure that the navigation prop is passed to the component.

Here is an example:

import { createStackNavigator } from 'react-navigation-stack';

const MyStack = createStackNavigator({
  SomeRoute: {
    screen: MyComponent
  }
});

export default MyStack;

Conclusion:

In this article, we looked at the reasons for the error "undefined is not an object evaluating this.props.navigation.navigate" in React Native and how to resolve it. By passing the navigation prop to the component using the withNavigation higher-
React Navigation Library:

React Navigation is a popular library used for navigation in React Native applications. It provides a simple and easy-to-use API for navigating between different screens in a React Native app. React Navigation also supports several types of navigation such as stack navigation, tab navigation, and drawer navigation.

Stack Navigation:

Stack Navigation is the most commonly used type of navigation in React Native. It allows developers to implement a stack of screens, where each screen is placed on top of the previous screen. This type of navigation is useful for implementing navigation with a back button, where pressing the back button takes the user to the previous screen. In React Navigation, stack navigation is implemented using the StackNavigator component.

Tab Navigation:

Tab Navigation is another type of navigation that is widely used in React Native. It allows developers to implement a bottom tab bar in their application, where each tab represents a different screen. This type of navigation is useful for applications that have multiple screens, but only a few of them are frequently used. In React Navigation, tab navigation is implemented using the TabNavigator component.

Drawer Navigation:

Drawer Navigation is a type of navigation that implements a drawer that slides in from the left or right side of the screen. This type of navigation is useful for applications that have many screens, but only a few of them are frequently used. In React Navigation, drawer navigation is implemented using the DrawerNavigator component.

Conclusion:

In this article, we looked at the React Navigation library, which is widely used for navigation in React Native applications. We also looked at the different types of navigation supported by React Navigation, such as stack navigation, tab navigation, and drawer navigation. Understanding these concepts is important for building robust and efficient navigation systems in React Native applications.

undefined is not an object evaluating this props navigation navigate react native with examples

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