webpsck配置react环境

npm  install  babel-core  babel-loader  babel-preset-react  babel-preset-es2015

jsx  // 高亮jsx语法

const path = require(‘path‘);
module.exports = {
entry: ‘./src/index.js‘,
devtool: ‘inline-source-map‘,
devServer: {
  contentBase: ‘./dist‘
},
output: {
  filename: ‘bundle.js‘,
  path: path.resolve(__dirname, ‘dist‘)
},
module: {
  rules: [
    {
      test: /\.jsx?$/,
      exclude: /node_modules/,
      loader: ‘babel-loader‘,
      query: {
        presets: [‘es2015‘, ‘react‘]
      }
    }
  ]
}
};