React Native Enable Disable TextInput Programmatically

React Native Enable/Disable TextInput

This is an example of React Native Enable Disable TextInput Programmatically. In this example, we will make a TextInput Enable/Disable on a click of a button. This type of task can be used while making any form that has interdependent fields like F1 needs to be filed before F2, so in that case, you can disable F2 until the user fill the field F1. We will use editable prop of the TextInput to make it Enable or Disable. So Let’s get started.

To Make a React Native App

Getting started with React Native will help you to know more about the way you can make a React Native project. We are going to use react native command line interface to make our React Native App.

If you have previously installed a global react-native-cli package, please remove it as it may cause unexpected issues:

npm uninstall -g react-native-cli @react-native-community/cli

Run the following commands to create a new React Native project

npx react-native init ProjectName

If you want to start a new project with a specific React Native version, you can use the --version argument:

npx react-native init ProjectName --version X.XX.X

Note If the above command is failing, you may have old version of react-native or react-native-cli installed globally on your pc. Try uninstalling the cli and run the cli using npx.

This will make a project structure with an index file named App.js in your project directory.

Code

Open App.js in any code editor and replace the code with the following code

App.js

//React Native Enable Disable TextInput Programmatically
//https://aboutreact.com/react-native-enable-disable-textinput-programmatically/

//import React in our code
import React, {useState} from 'react';

//import all the components we are going to use
import {
  SafeAreaView,
  View,
  TextInput,
  StyleSheet,
  Button
} from 'react-native';

const App = () => {
  const [isEditable, setIsEditable] = useState(false);

  const updateState = () => {
    //Handler to enable of disable TextInput
    //Make TextInput Enable/Disable
    setIsEditable(!isEditable);
  };

  return (
    <SafeAreaView style={{flex: 1}}>
      <View style={styles.container}>
        <TextInput
          placeholder={
            isEditable ?
            'Please Insert value' :
            'Input Disabled'
          }
          underlineColorAndroid="transparent"
          style={[
            styles.textInputStyle,
            {
              borderColor: isEditable ?
              'black' : 'red',
              backgroundColor: isEditable ?
              'white' : '#d8d8d8',
            },
          ]}
          //To make TextInput enable/disable
          editable={isEditable}
        />
        <Button
          title={
            isEditable
              ? 'Click to Disable TextInput'
              : 'Click to Enable TextInput'
          }
          onPress={updateState}
        />
      </View>
    </SafeAreaView>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
    margin: 10,
    marginTop: 30,
    padding: 30,
  },
  textInputStyle: {
    textAlign: 'center',
    height: 40,
    borderWidth: 1,
    marginTop: 10,
    marginBottom: 10,
  },
});

export default App;

To Run the React Native App

Open the terminal again and jump into your project using.

cd ProjectName

1. Start Metro Bundler

First, you will need to start Metro, the JavaScript bundler that ships with React Native. To start Metro bundler run following command:

npx react-native start

Once you start Metro Bundler it will run forever on your terminal until you close it. Let Metro Bundler run in its own terminal. Open a new terminal and run the application.

2. Start React Native Application

To run the project on an Android Virtual Device or on real debugging device:

npx react-native run-android

or on the iOS Simulator by running (macOS only)

npx react-native run-ios

Output Screenshots

IOS

Android

Output in Online Emulator

This is how you can enable or disable a TextInput. If you have any doubts or you want to share something about the topic you can comment below or contact us here. There will be more posts coming soon. Stay tuned!

Hope you liked it. 🙂