React Native - 为什么我需要 babel 或 webpack

React Native - 为什么我需要 Babel 或 Webpack？

javascript
import React from 'react';
import { View, Text } from 'react-native';
const MyComponent = () => {
  const [count, setCount] = React.useState(0);
  return (
    
      {`Count: ${count}`}
       setCount(count + 1)} />
    
  );
};
export default MyComponent;

javascript
import React, { useState } from 'react';
import { View, Text, Button } from 'react-native';
const MyComponent = () => {
  const [count, setCount] = useState(0);
  return (
    
      {`Count: ${count}`}
       setCount(count + 1)} />
    
  );
};
export default MyComponent;

javascript
// webpack.config.js
const path = require('path');
module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
    ],
  },
};