React native android Undefined is not function

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React native android:

When I am navigating from one screen to next screen

undefined is not a function (evaluating '(0, _reactNavigation.StackNavigator)({ SettingScreen: { screen: _settings.default }, HomeScreen: { screen: _Home.default } })')

App.js

import React, {Component} from 'react';
import { AppRegistry} from 'react-native';
import { Button } from 'react-native';
import {Navigation} from 'react-native'
import { StackNavigator } from 'react-navigation';

import Settings from './screens/Settings';
import Home from './screens/Home';

const AppNavigator = StackNavigator({
  SettingScreen: { screen: Settings },
  HomeScreen: { screen: Home }
});

export default class App extends Component<Props> {

    render() {
    return (
        <AppNavigator />
    );
  }
}

Setting.js

import React, { Component } from 'react';
import { View, Text, Button } from 'react-native';

export class Settings extends Component {
  render() {
    return (
      <View>
        <Text>This is the Settings screen</Text>
        <Button onPress={() => this.props.navigation.navigate('HomeScreen')} title="Home"/>
      </View>
    )
  }
};

export default Settings;

Home.js

import React, { Component } from 'react';
import { View, Text } from 'react-native';

export class Home extends Component {
  render() {
    return (
      <View>
        <Text>This is the home screen</Text>
      </View>
    )
  }
}

export default Home

Please try the updated function like below.

const App = createStackNavigator({
Home: {screen: HomeScreen},
Profile: {screen: ProfileScreen},
});

TypeError: undefined is not a function (evaluating 'instance.render , very simple. just "react-native run-android" and tada !! +1 4. If you're running the current version of react-native, react-devtools-core 3.5.x is a transitive dependency and as a result npm/yarn install will result in react-native having its own copy at that version. Even despite whether you specify 3.4.x in your own package.json.

  1. Update your App.js to the below.

    const App = createStackNavigator({ Home: HomeScreen, Profile: ProfileScreen, });

    export default createAppContainer(App);

  2. Remove the line export default Settings;

  3. Remove the line export default Home;

react-native run-android is giving error undefined is not a function , react-native run-android is giving error undefined is not a function (evaluating '​react DevTools.connect DevTools') #22865. Closed. When testing on Android 5.0+ (Google API 22+) I found that calls to padStart would result in "undefined is not a function". Polyfilling it manually resolved the issue in Android 5.0+. My polyfill fix was a verbatim copy/paste of the polyfill example on MDN's padStart .

Please, Try with the below changes.

import { createStackNavigator } from "react-navigation";

const AppNavigator = createStackNavigator(
 {
    SettingScreen: { screen: Settings },
    HomeScreen: { screen: Home }
  }
)

React Native: undefined is not a function(evaluating '(0 , React Native: undefined is not a function(evaluating '(0, _reactNavigation. for iOS but for Android it is (createMaterialTopTabNavigator). Dismiss Join GitHub today. GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together.

Error: Undefined is not a function : reactnative, For some reason, when I press my AddButton, I get the error "Undefined is not a import { View, ListView, Text, TouchableHighlight, Modal } from 'react-native'; about native modules, and how things like Xcode and Android Studio work. React component that wraps the platform DrawerLayout (Android only). The Drawer (typically used for navigation) is rendered with renderNavigationView and direct children are the main view (where your content goes). The navigation view is initially not visible on the screen, but can be pulled in from the side of the window specified by the drawerPosition prop and its width can be set by the drawerWidth prop.

@react-native-community/netinfo, React Native Network Info API for iOS & Android. Linking the package manually is not required anymore with Autolinking. reachabilityTest, (response: Response) => boolean, A function which is passed the Response from  The app crushes when Uin8Array.from is called (undefined for some reason). It only happens on android environment and when debug mode is disabled. code line: let array = Uint8Array.from(atob(validFor), c => c.charCodeAt(0)) Bug report: TypeError: undefined is not a function (evaluating 'Uint8Array.from((0, _base.decode)(validFor), function (c)

react-native-permissions, An unified permissions API for React Native on iOS and Android. By default no permission handler is installed. Update your Podfile by choosing the ones you want to check or request, then run pod install . Usage with React Navigation. If you are using React Navigation to navigate across different screens, you can follow their guide on Custom Android back button behaviour. Backhandler hook. React Native Hooks has a nice useBackHandler hook which will simplify the process of setting up event listeners.