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metro-react-native-babel-preset
Advanced tools
The metro-react-native-babel-preset package is a Babel preset for React Native applications. It includes the Babel plugins and configurations necessary to compile JavaScript code in a way that is compatible with the React Native platform. This preset helps developers by abstracting the complex Babel configurations required for React Native development.
Transform JSX
This code sample demonstrates how JSX is transformed into JavaScript that React Native can understand. The metro-react-native-babel-preset handles the necessary transformations behind the scenes.
import React from 'react';
import { View, Text } from 'react-native';
function MyComponent() {
return (
<View>
<Text>Hello, world!</Text>
</View>
);
}
ESNext Features
This code sample shows the use of class properties, an ESNext feature. The preset allows developers to write modern JavaScript by transpiling features that are not natively supported by the React Native JavaScript engine.
class MyComponent extends React.Component {
state = { greeting: 'Hello' };
render() {
return <Text>{this.state.greeting}, world!</Text>;
}
}
Module Resolution
This code sample illustrates module resolution. The preset configures Babel to resolve modules in a way that is compatible with the Metro bundler used by React Native.
import myModule from 'my-module';
The @babel/preset-env package is a widely-used Babel preset that allows developers to use the latest JavaScript features without worrying about browser compatibility. It is similar to metro-react-native-babel-preset in that it handles modern JavaScript features, but it is targeted towards web development rather than React Native.
The @babel/preset-react package is a Babel preset specifically for React applications. It includes plugins that transform JSX and other React-specific syntax. It is similar to metro-react-native-babel-preset, but it does not include React Native-specific transformations and optimizations.
The babel-preset-expo package is a Babel preset for Expo apps, which are built on top of React Native. It extends metro-react-native-babel-preset with additional Expo-specific configurations and plugins. It is similar but tailored for the Expo ecosystem.
FAQs
Babel preset for React Native applications
The npm package metro-react-native-babel-preset receives a total of 1,291,476 weekly downloads. As such, metro-react-native-babel-preset popularity was classified as popular.
We found that metro-react-native-babel-preset demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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