I want to create and use a CustomTextInput in React Native. I have created it as per the code below but the onChangeText property in CustomTextInput is not working properly.
Despite extensive research, I can't figure out the cause of the problem. What might I have missed?
import React, { useState } from 'react'; import { View, StyleSheet } from 'react-native'; import { TextInput } from 'react-native'; const App = () => { const [inputValue, setInputValue] = useState(''); const CustomTextInput = ({ value, onChangeText, placeholder, style }) => { return ( ); }; const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#f0f0f0', }, textInput: { width: '80%', height: 40, borderWidth: 1, borderColor: 'gray', padding: 10, }, }); export default App;
You can also check here https://snack.expo.dev/@cemyeten/handling-text-input
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As I can see, you create a component inside the component and use it.
However, since you created a functional component inside the component, it will be recreated every time a state update occurs.
A better option is to move the CustomTextInput off the screen or any component with state.
For example:
import React, { useState } from 'react'; import { View, StyleSheet } from 'react-native'; import { TextInput } from 'react-native'; const CustomTextInput = ({ value, onChangeText, placeholder, style }) => { return ( ); }; const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#f0f0f0', }, textInput: { width: '80%', height: 40, borderWidth: 1, borderColor: 'gray', padding: 10, }, }); export default App;Put your component outside the
Appfunction or better yet create a separate file for it because if you put it inside, when you write the text useState hook re Render theAppfunction to reflect it on the UI, which will cause your component to lose focus.Fixed code:
import React, { useState } from 'react'; import { View, StyleSheet } from 'react-native'; import { TextInput } from 'react-native'; const CustomTextInput = ({ value, onChangeText, placeholder, style,...other }) => { return ( ); }; const styles = StyleSheet.create({ container: { flex: 1, justifyContent: 'center', alignItems: 'center', backgroundColor: '#f0f0f0', }, textInput: { width: '80%', height: 40, borderWidth: 1, borderColor: 'gray', padding: 10, }, }); export default App;