webpack.config.js

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = {
  entry: './src/index.js',
  output: {
    filename: 'index.js',
    path: path.resolve(__dirname, 'lib')
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        use: ['babel-loader'],
        // 排除 node_modules 目录下的文件
        // node_modules 目录下的文件都是采用的 ES5 语法，没必要再通过 Babel 去转换
        exclude: path.resolve(__dirname, 'node_modules'),
      },
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: "style-loader",
          use: ["css-loader"]
        })
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin({
      filename: 'index.css',
    }),
    new HtmlWebpackPlugin({
      filename: 'index.html',
      template: path.join(__dirname, 'src/index.html')
    })
  ],
  devtool: 'source-map'
};