react-native/docs/Basics-Component-TextInput.md

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Direct text-based user input is a foundation for many apps. Writing a post or comment on a page is a canonical example of this. TextInput is a basic component that allows the user to enter text.

This example creates a simple TextInput box with the string Hello as the placeholder when the TextInput is empty.

import React from 'react';
import { AppRegistry, TextInput, View } from 'react-native';

const App = () => {
  return (
      <View>
        <TextInput placeholder="Hello" />
      </View>
  );
}

// App registration and rendering
AppRegistry.registerComponent('MyApp', () => App);