Core Components in React Native: What They Are and How They Work

Core components in React Native are the basic building blocks like View, Text, and Image that let you create user interfaces. They work like simple containers or display elements that you combine to build your app's screens and layouts.

How It Works

Think of core components in React Native as the basic Lego blocks for building your app's interface. Each component has a specific role, like View acts as a container to hold other components, Text displays words, and Image shows pictures. You combine these blocks to create the screens users see and interact with.

Under the hood, React Native translates these components into native UI elements on iOS and Android. This means your app looks and feels like a real native app, but you write it using JavaScript and React's simple syntax. This process is like having a translator that turns your Lego instructions into real building parts on different platforms.

Example

This example shows a simple React Native screen using core components: a container View, some Text, and an Image. It displays a greeting and a picture.

react_native

import React from 'react';
import { View, Text, Image, StyleSheet } from 'react-native';

export default function App() {
  return (
    <View style={styles.container}>
      <Text style={styles.title}>Hello, React Native!</Text>
      <Image
        style={styles.logo}
        source={{ uri: 'https://reactnative.dev/img/tiny_logo.png' }}
      />
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#fff'
  },
  title: {
    fontSize: 24,
    marginBottom: 20
  },
  logo: {
    width: 64,
    height: 64
  }
});

Output

A white screen with centered text 'Hello, React Native!' above a small React Native logo image.

When to Use

Use core components whenever you need to build the basic structure and content of your app. For example, use View to group elements or create layouts, Text to show any text like labels or instructions, and Image to display pictures or icons.

They are perfect for almost every screen in your app because they provide the foundation. When you want to add buttons, lists, or inputs, React Native also offers other core components like Button, FlatList, and TextInput that extend this basic set.

Key Points

• Core components are the essential building blocks in React Native.
• View is like a container or box for layout.
• Text displays readable text on screen.
• Image shows pictures from local or web sources.
• They translate to native UI elements for smooth performance.

Key Takeaways

Core components like View, Text, and Image form the foundation of React Native UI.

They let you build layouts and display content that feels native on iOS and Android.

Use View to group elements, Text to show words, and Image to display pictures.

React Native converts these components into real native elements for performance.

Other core components extend functionality for buttons, lists, and inputs.