We Keep Coding

react native render error (view config getter callback for component 'div'?

I have a problem with react-native. I'm trying exercise to do todo app from how I watch on youtube lessons. Can't understand where is my fault? Youtuber instructor codes all of same, his code working but my code doesn't working.
This is app.js file:
import React from 'react';
import { StyleSheet, Text, View } from 'react-native';
import Task from './components/Task';
export default function App() {
return (
<View style={styles.container}>
<View style={styles.taskWrapper}>
<Text style={styles.sectionTitle}>Today Works</Text>
<View style={styles.items}>
<Task text={'Task1'} />
<Task text={'Task2'} />
</View>
</View>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#E8EAED',
},
taskWrapper: {
paddingTop: 80,
paddingHorizontal: 20,
},
sectionTitle: {
fontSize: 24,
fontWeight: 'bold',
},
items: {
},
});
and this is /components/Task.js file;
import React from 'react';
import { View, Text, StyleSheet } from 'react-native';
import { TouchableOpacity } from 'react-native-web';
const Task = (props) => {
return(
<View style={styles.item}>
<View style={styles.itemLeft}>
<TouchableOpacity style={styles.square}></TouchableOpacity>
<Text style={styles.itemText}>{props.text}</Text>
</View>
<View style={styles.circular}></View>
</View>
)
}
const styles = StyleSheet.create ({
itemLeft: {
},
square: {
},
itemText: {
},
circular: {
},
});
export default Task;
That codes not working.
I got these errors in expo ;
You can see error here>
What is my fault?

You are importing TouchableOpacity from 'react-native-web' (maybe because of intellisense).
The compiler is then filling that with a <div> instead of a <View>.
Change it to just 'react-native'.

ReferenceError can't find variable flatlist and Element Type Invalid

I was following tutorial and I got 'ReferenceError can't find variable flatlist' error, then I deleted the code and copied from the github to check if I might missed something and it's still didn't work.
import React, {useState} from 'react';
import {StyleSheet, Text, View,FlatList} from 'react-native';
import Header from './components/header';
export default function App () {
const [todos, setTodos] = useState([
{ text: 'buy coffee', key: '1' },
{ text: 'create an app', key: '2' },
{ text: 'play on the switch', key: '3' }
]);
return (
<View style={styles.container}>
<Header />
<View style={styles.content}>
{/* add todo form */}
<View style={styles.list}>
<FlatList
data={todos}
renderItem={({item}) => (
<Text>{item.text}</Text>
)}
/>
</View>
</View>
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
},
content:{
padding: 40,
},
list:{
marginTop:20,
}
});
Header :
import React from 'react';
import {StyleSheet, Text, View} from 'react-native';
export default function Header() {
return(
<View style={styles.header}>
<Text style={styles.title}>My Todo List</Text>
</View>
)
}
const styles= StyleSheet.create({
header:{
height: 80,
paddingTop: 38,
backgroundColor: 'red',
},
title:{
textAlign: 'center',
color:'#fff',
fontSize: 20,
fontWeight:'bold',
}
});
export default Header;
Perhaps something changed in the version or something else. I will be grateful if you can tell how I can fix the error.
Edit: I changed the casing from Flatlist to FlatList and I got error 'Element type invalid: expected a string (for built- in components)'.
\ Screenshot

change case of Flatlist import as:
import {StyleSheet, Text, View,FlatList} from 'react-native';
check export of your header component. You have exported Header Component two time.

Try Replace Flatlist with FlatList
Correct: import {StyleSheet, Text, View,FlatList} from 'react-native';
Also, try to export as Class, if it's entry point:
import React, { Component } from 'react';
export default class App extends Component {
state = {
todos: [
{ text: 'buy coffee', key: '1' },
{ text: 'create an app', key: '2' },
{ text: 'play on the switch', key: '3' },
],
};
render() {
const { todos } = this.state;
return (
<View style={styles.container}>
<Header />
<View style={styles.content}>
{/* add todo form */}
<View style={styles.list}>
<FlatList
data={todos}
renderItem={({ item }) => <Text>{item.text}</Text>}
/>
</View>
</View>
</View>
);
}
}

react native - Passing navigation props from parent to child

I'm trying to create a simple-ish mobile app, but I'm pretty new to this. I've spent some time searching about the errors I'm getting. It seems like a common problem, but they all had the same/similar solutions but the solutions didn't work for me.
What is I'm trying to do? Right now the app is two pages, the home screen (Overview Cards) and the Add Card screen.
There's a button on the Overview Cards that takes you to Add Card.
Add Card allows you to fill out some TextInput boxes and
Add Card should allow you to press the save button and be taken back to the Overview Card screen and see the data you entered in the form.
However, I am getting stuck at Step 3. I am trying to make the Save button navigate the user back to Overview Cards, but there are simply errors instead.
Below is my code, the errors I'm getting, and then what I've tried.
App.js
import React from 'react';
import { StyleSheet, Text, TextInput, View, Button, TouchableOpacity, ShadowPropTypesIOS } from 'react-native';
import AddCard from './components/AddCard.js';
import { NavigationContainer } from '#react-navigation/native';
import { createStackNavigator } from '#react-navigation/stack';
import { useNavigation } from '#react-navigation/native';
function HomeScreen({ navigation }) {
return (
<View style={styles.homeContainer}>
<Button title="Add Card" onPress={() => navigation.navigate('Add Card')}/>
{/* <Text value={this.props.inputValFT}/> */}
<Text style={styles.textStyle} >VISA xxxx</Text>
<Text style={styles.textStyle}>MASTERCARD xxxx</Text>
<Text style={styles.textStyle}>AMEX xxxx</Text>
</View>
);
}
function AddCardScreen() {
return (
<View style={styles.addCardContainer}>
<AddCard navigation={this.props.navigation} /> // **HERE**
</View>
);
}
const Stack = createStackNavigator();
function App() {
return (
<NavigationContainer>
<Stack.Navigator>
<Stack.Screen name="Home" component={HomeScreen} options={{ title: 'Overview Cards' }} />
<Stack.Screen name="Add Card" component={AddCardScreen} />
</Stack.Navigator>
</NavigationContainer>
);
}
// function AddCardButton(){
// return (
// <View style={styles.buttonContainer}>
// <TouchableOpacity>
// <Text style={styles.button}>Add Card</Text>
// </TouchableOpacity>
// </View>
// );
// }
export default App;
const styles = StyleSheet.create({
homeContainer: {
flex: 1,
backgroundColor: '#ef95b1',
alignItems: 'center',
justifyContent: 'flex-start',
},
addCardContainer: {
flex: 1,
backgroundColor: '#28cdf0',
justifyContent: 'flex-start',
},
buttonContainer: {
flexDirection: 'row',
alignSelf: 'flex-end',
marginTop: 15,
},
button: {
flexDirection: 'row',
alignSelf: 'flex-end',
marginTop: 15,
right: 10,
backgroundColor: '#2565ae',
borderWidth: 1,
borderRadius: 12,
color: 'white',
fontSize: 15,
fontWeight: 'bold',
overflow: 'hidden',
padding: 10,
textAlign:'center',
},
textStyle: {
padding: 10,
}
});
Navigation.js
import React, { Component } from 'react';
import { View, Text } from 'react-native';
import { createAppContainer } from 'react-navigation';
import { createStackNavigator } from 'react-navigation-stack';
import AddCardScreen from './AddCard';
const RootStack = createStackNavigator(
{
Home: HomeScreen,
AddCard: AddCardScreen,
},
{
initialRouteName: 'Home',
}
);
const AppContainer = createAppContainer(RootStack);
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#ef95b1',
alignItems: 'center',
justifyContent: 'flex-start',
},
textStyle: {
padding: 10,
}
});
export default createAppContainer(Navigation);
AddCard.js
import React, { Component } from 'react';
import { StyleSheet, View, Text, TextInput, TouchableOpacity } from 'react-native';
import { Input } from 'react-native-elements'
import { ScrollView } from 'react-native-gesture-handler';
// import { loadSettings, saveSettings } from '../storage/settingsStorage';
class AddCardScreen extends Component {
constructor(props) {
super(props);
this.state = {
firstTwo : '',
lastFour : '',
recentAmt : ''
};
this.addFT = this.addFT.bind(this)
this.addLF = this.addLF.bind(this)
this.addRecAmt = this.addRecAmt.bind(this)
}
static navigationOptions = {
title: 'Add Card'
};
addFT(firstTwo) {
this.setState(Object.assign({}, this.state.firstTwo, { firstTwo }));
}
addLF(lastFour) {
this.setState(Object.assign({}, this.state.lastFour, { lastFour }));
}
addRecAmt(recentAmt) {
this.setState(Object.assign({}, this.state.recentAmt, { recentAmt }));
}
// handleSubmit() {
// alert('New card saved. Returning to Home to view addition.');
// navigation.navigate('Home')
// } // firstTwo, lastFour, recentAmt
render() {
const {navigation} = this.props;
return (
<ScrollView>
<View style={styles.inputContainer}>
<Text h1> "Add a new card!" </Text>
<TextInput
style={styles.textInput}
placeholder="First two digits of card"
placeholderTextColor="#000000"
keyboardType={'number-pad'}
maxLength = {2}
onChangeText={this.addFT}
inputValFT={this.state.firstTwo}
/>
<TextInput
style={styles.textInput}
placeholder="Last four digits of card"
placeholderTextColor="#000000"
keyboardType={'number-pad'}
maxLength = {4}
onChangeText={this.addLF}
inputValLF={this.state.lastFour}
/>
<TextInput
style={styles.textInput}
placeholder="Most recent dollar amount"
placeholderTextColor="#000000"
keyboardType={'decimal-pad'}
onChangeText={this.addRecAmt}
inputValRA={this.state.recentAmt}
/>
</View>
<View style={styles.inputContainer}>
<TouchableOpacity
style={styles.saveButton}
onPress={() => navigation.navigate('Home')}> // ** HERE 2 **
<Text style={styles.saveButtonText}>Save</Text>
</TouchableOpacity>
</View>
</ScrollView>
);
}
}
// this.handleSubmit.bind(this)
export default AddCardScreen;
const styles = StyleSheet.create({
inputContainer: {
paddingTop: 15
},
textInput: {
borderColor: '#FFFFFF',
textAlign: 'center',
borderTopWidth: 1,
borderBottomWidth: 1,
height: 50,
fontSize: 17,
paddingLeft: 20,
paddingRight: 20
},
saveButton: {
borderWidth: 1,
borderColor: '#007BFF',
backgroundColor: '#007BFF',
padding: 15,
margin: 5
},
saveButtonText: {
color: '#FFFFFF',
fontSize: 20,
textAlign: 'center'
}
});
The errors I'm getting:
In App.js you can see the ** HERE ** that I put in. When I try to run this, the app loads fine until I click the "Add Card" button. I get this error: undefined is not an object (evaluating 'this.props.navigation').
If I take the navigate={this.props.navigation} part out from App.js, the app loads as it's meant to again, but this time I can click the "Add Card" button and reach the next screen with no issue. I fill out the form (TextInput parts in AddCard.js), but when I click the "Save" button, the app crashes. The error is: TypeError: undefined is not an object (evaluating 'navigation.navigate'). Most likely because of what I'm doing with onPress where it says ** HERE 2 ** in AddCard.js. handleSubmit() is currently commented out, but it used to be inside the onPress.
What I've tried:
Some of the answers I saw were that I need to pass in navigation from the parent to the child and that will make it work. By trying that, I get the errors I mentioned earlier. I also saw that someone mentioned using "withNavigation" or "useNavigation" which was supposed to allow the child to access navigation, but that didn't work for me either. Below are some of the links that I was trying to follow.
How do I pass navigation props from parent component to header?
Pass navigation.navigate to Child Component
https://reactnavigation.org/docs/use-navigation/
Thank you for reading, hopefully my explanation is clear enough.

I think your problem is somewhere here:
function AddCardScreen({ navigation }) {
return (
<View style={styles.addCardContainer}>
<AddCard navigation={navigation} />
</View>
);
}
There is no this, you're not in a class component, therefore this doesn't exists
The prop you are trying to pass should be called navigation and not navigate, since that's how you try to access it in the child component.
The navigation prop needs to be destructured inside the function argument function AddCardScreen({ navigation }), same as you already do for HomeScreen.

Passing onPress redirect to child component React Native

I am struggling a little bit. I have tried to create more components for my React native app but after I did it my ButtonSaving stoped redirecting to Dashboard for some reason. I was trying some ways to pass onRowPress to component but without luck. What do I do incorrectly here please?
Login button is working fine => redirecting to Dashboard
ButtonSaving not working at all => should redirect to Dashboard
AppNavigator.js
import { createStackNavigator } from 'react-navigation-stack'
import { createAppContainer } from 'react-navigation';
import Homepage from './components/Homepage/Homepage';
import Dashboard from './components/Dashboard/Dashboard';
const AppNavigator = createStackNavigator({
Homepage: Homepage,
Dashboard: { screen: Dashboard},
},
{
initialRouteName: 'Homepage',
defaultNavigationOptions: {
headerStyle: {
backgroundColor: 'white',
opacity: 70,
borderBottomColor: 'white',
borderColor: 'white'
},
headerTintColor: 'black',
headerTitleStyle: {
fontWeight: 'bold'
}
}
}
);
const Container = createAppContainer(AppNavigator);
export default Container;
Homepage.js
import React from 'react';
import { StyleSheet, Text, View, Button, Image } from 'react-native';
import {NavigationActions} from 'react-navigation';
// COMPONENTS
import ButtonSaving from './ButtonSaving/ButtonSaving';
class Homepage extends React.Component {
constructor(props) {
super(props);
this.state = {
isLoading: false
},
this.handleClick = this.handleClick.bind(this);
this.onRowPress = this.onRowPress.bind(this);
}
handleClick() {
const counterApp = this.state.counter;
this.setState({
counter: counterApp + 1,
dashboard: 'Dashboard'
})
}
onRowPress = ({ navigation }) => {
this.props.navigation.navigate(this.state.dashboard);
}
render() {
return(
<View style={styles.container}>
{/* LOGIN BUTTON */}
<View style={styles.buttonContainer}>
<View style={styles.buttonLogin}>
<Button title="log in"
color="white"
onPress={() => this.props.navigation.navigate('Dashboard')}/>
</View>
</View>
{/* LOGO CONTAINER */}
<View style={styles.logoContainer}>
<Image
style={{height: 147, width: 170}}
source= {require('./REACT_NATIVE/AwesomeProject/logo.png')}
></Image>
</View>
{/* EXPLAINATION OF WALT */}
<Text style={styles.textContainer}>Lorem ipsum lorem upsum></Text>
{/* Needs to be refactored to VIEW */}
<ButtonSaving onPress={() => this.onRowPress}/>
</View>)
}
ButtonSaving.js
import React from 'react';
import { StyleSheet, Text, View, Button, Image, TouchableOpacity } from 'react-native';
import { LinearGradient } from 'expo-linear-gradient';
class ButtonSaving extends React.Component {
constructor(props) {
super(props);
this.state = {
},
this.onRowPress = this.onRowPress.bind(this);
}
onRowPress = ({ navigation }) => {
this.props.navigation.navigate(this.state.dashboard);
}
render(){
return(
<View style={styleButton.container}>
<LinearGradient
colors={[
'#00b38f',
'#7dcf5a'
]}
style={styleButton.opacityContainer}>
<TouchableOpacity>
<Button
title="Start Saving"
color='white'
onPress={this.onRowPress}/>
</TouchableOpacity>
</LinearGradient>
</View>
)
}
}
const styleButton = StyleSheet.create({
container: {
display: 'flex',
flexDirection: 'row',
flexWrap: 'wrap',
width: '100%',
height: 50,
justifyContent: 'center',
marginTop: '39%'
},
opacityContainer: {
height: 48,
borderRadius: 25,
backgroundColor: 'darkgreen',
width: '70%',
justifyContent: 'center',
alignItems: 'center'
}
})
export default ButtonSaving;

You miss to put dashboard in your state in ButtonSaving.js
In Homepage.js when your are calling handleClick ?. Dunno how you got that working...

You say in the onRowPress this:
this.props.navigation.navigate(this.state.dashboard);
but I don't see anywhere that you set this.state.dashboard.
Probabbly you missed set it up.

It was simple refactor and this helped!
<ButtonSaving navigation ={this.props.navigation}/>
I will update solution for others later.

There is no point to save "dashboard" in the Homepage state or the ButtonSaving state.
In Homepage.js you don't need to pass onPress to ButtonSaving
...
<ButtonSaving navigation={this.props.navigation}/>
...
Next in ButtonSaving.js
onRowPress = () => {
this.props.navigation.navigate('Dashboard');
}

How can display one or more details in one component - React Native?

I have main Tabs "Categories" and I want when I click to any one of them it will just appeared his Details,
so I'm decleare a flag to every category and update it when clicked to display category details, BUT I think this is a wrong idea! and other issue when I click to first category it's appear his details, but when I clicked other Category from the tabs, the first category it's still around!
So how can I handle these issue?
Snack Here
Here's my Code
import React, { Component } from 'react';
import { Text, View, ScrollView,TouchableOpacity } from 'react-native';
export default class App extends Component {
state = {
open:true,
cat2:false,
cat3:false,
cat4:false,
}
render() {
return (
<View style={{flex: 1}} >
<ScrollView style={{flexGrow: 0.05, backgroundColor: '#347ed8', paddingTop: 50}} horizontal>
<TouchableOpacity onPress={()=>this.setState({open:!this.state.open})} style={{width: 100}}><Text style={{color:"#fff",fontSize:18}}>cat1 </Text></TouchableOpacity>
<TouchableOpacity
onPress={()=>this.setState({
cat2:!this.state.cat2
})}
style={{width: 100}}><Text style={{color:"#fff",fontSize:18}}>Cat2</Text></TouchableOpacity>
<TouchableOpacity style={{width: 100}}><Text style={{color:"#fff",fontSize:18}}>Cat3</Text></TouchableOpacity>
<TouchableOpacity style={{width: 100}}><Text style={{color:"#fff",fontSize:18}}>Cat4</Text></TouchableOpacity>
<TouchableOpacity style={{width: 100}}><Text style={{color:"#fff",fontSize:18}}>Cat5</Text></TouchableOpacity>
</ScrollView>
<View style={{flex: 0.95, backgroundColor: '#ddd'}}>
{this.state.open && <View>
<Text>Category Details One Here</Text>
</View>}
{this.state.cat2 && <View>
<Text>Category Details Two Here!</Text>
</View>}
{this.state.cat3 && <View>
<Text>Category Details Three Here!</Text>
</View>}
{this.state.cat4 && <View>
<Text>Category Details four Here!</Text>
</View>}
</View>
</View>
);
}
}

A simple solution to do what you want is to use a React-navigation module.
This problem should be that you have not set up touch events elsewhere, and the values shown by setting the conditions for touch events are different. However, this condition can mess up your code, which can be handled simply using the 'React-navigation' module.
You can use createMaterialTopTabNavigator
Example
import {
createStackNavigator,
createMaterialTopTabNavigator,//React navigation version 4 and before
createAppContainer,
} from 'react-navigation';
import { createMaterialTopTabNavigator } from 'react-navigation-tabs'; //React navigation version 4
//import Navigator in our project
import FirstPage from './pages/FirstPage';
import SecondPage from './pages/SecondPage';
//Making TabNavigator which will be called in App StackNavigator
//we can directly export the TabNavigator also but header will not be visible
//as header comes only when we put anything into StackNavigator and then export
const TabScreen = createMaterialTopTabNavigator(
{
Home: { screen: FirstPage },
Settings: { screen: SecondPage },
},
{
tabBarPosition: 'top',
swipeEnabled: true,
animationEnabled: true,
tabBarOptions: {
activeTintColor: '#FFFFFF',
inactiveTintColor: '#F8F8F8',
style: {
backgroundColor: '#633689',
},
labelStyle: {
textAlign: 'center',
},
indicatorStyle: {
borderBottomColor: '#87B56A',
borderBottomWidth: 2,
},
},
}
);
//making a StackNavigator to export as default
const App = createStackNavigator({
TabScreen: {
screen: TabScreen,
navigationOptions: {
headerStyle: {
backgroundColor: '#633689',
},
headerTintColor: '#FFFFFF',
title: 'TabExample',
},
},
});