const path = require('path');
const DllPlugin = require('webpack/lib/DllPlugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');    //js压缩
const { library } = require('./package.json');
module.exports = {
  mode: 'production',
  // 入口文件
  entry: library,
  // 输出文件
  output: {
    // 文件名称
    filename: '[name].dll.js',
    // 将输出的文件放到dist目录下
    path: path.resolve(__dirname, 'lib'),
    library: '_dll_[name]'
  },
  module: {
    rules: [
      {
        test: /\.vue$/,
        loader: 'vue-loader'
      },
      {
        test: /\.js$/,
        loader: 'babel-loader',
        exclude: /node_modules/
      }
    ]
  },
  plugins: [
    // 使用插件 DllPlugin
    new DllPlugin({
      name: '_dll_[name]',
      /* 生成manifest文件输出的位置和文件名称 */
      path: path.join(__dirname, 'lib/[name].manifest.json')
    }),
  ],
  optimization: {
    minimizer: [
      //js压缩
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        sourceMap: false,
        uglifyOptions: {
          warnings: false,
          compress: {
            drop_console: true, // console
            drop_debugger: false,
            pure_funcs: ['console.log'] // 移除console
          }
        }
      }),
    ]
  }
};