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 init to make our React Native App. Assuming that you have node installed, you can use npm to install the react-native-cli command line utility. Open the terminal and go to the workspace and run

npm install -g react-native-cli

Run the following commands to create a new React Native project

react-native init ProjectName

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

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

react-native init ProjectName --version react-native@next

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

/*This is an example of React Native Enable Disable TextInput Programmatically*/
import React, { Component } from 'react';
import { View, TextInput, StyleSheet, Button } from 'react-native';

export default class App extends React.Component {
  constructor() {
    super();
    this.state = {
      isEditable: false,
      buttonLabel: 'Enable TextInput',
    };
  }

  _clickhandler(){
    //Handler to enable of disable TextInput
      this.setState({ isEditable: !this.state.isEditable });
      //Make TextInput Enable/Disable
      this.setState({ 
            buttonLabel: this.state.isEditable ? 'Enable TextInput':'Disable TextInput' 
           //updating the label of the button
      });
  }

  render() {
    return (
      <View style={styles.MainContainer}>
        <TextInput
          placeholder="Enter Password"
          underlineColorAndroid="transparent"
          style={[
            styles.TextInput,
            {
              borderColor: this.state.isEditable ? 'red' : 'blue',
              //updating the border color on enable/disable 
            },
          ]}
          //editable is used to make TextInput enable/disable
          editable={this.state.isEditable}
        />
        <Button title={this.state.buttonLabel} onPress={this._clickhandler.bind(this)}/>
      </View>
    );
  }
}

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

To Run the React Native App

Open the terminal again and jump into your project using.

cd ProjectName

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

react-native run-android

or on the iOS Simulator by running

react-native run-ios (macOS only).

Output Screenshots

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. 🙂