vue2 webpack打包配置

序言

最近在优化之前做的项目，看到打包后的文件夹，出现很多不需要的文件，想着应该是打包出现了问题，之前没时间优化，现在来看看优化项吧。

RemovedPluginError: webpack.optimize.CommonsChunkPlugin has been removed, please use config.optimization.splitChunks instead
以上就是在使用命令行 npm run build:prod 之后出现的错误信息

打包配置

在项目中找到build文件夹下，找到webpack.prod.conf.js文件，可以注释掉或者删除，因为webpack版本是4.0以上的，CommonsChunkPlugin被移除掉了，所以导致打包出错。

解决方法

const webpackConfig = merge(baseWebpackConfig, {
  module: {
    rules: utils.styleLoaders({
      sourceMap: config.build.productionSourceMap,
      extract: true,
      usePostCSS: true
    })
  },
  devtool: config.build.productionSourceMap ? config.build.devtool : false,
  output: {
    path: config.build.assetsRoot,
    filename: utils.assetsPath('js/[name].[chunkhash].js'),
    chunkFilename: utils.assetsPath('js/[id].[chunkhash].js'),
    // publicPath:'./'
  },
  optimization: {
    runtimeChunk: {
      name: 'manifest'
    },
    splitChunks: {
      maxInitialRequests: 10,
      cacheGroups: {
        common: {name: 'common'}
      }
    }
  },
  plugins: [
    // http://vuejs.github.io/vue-loader/en/workflow/production.html
    new webpack.DefinePlugin({
      'process.env': env
    }),
    new UglifyJsPlugin({
      uglifyOptions: {
        compress: {
          warnings: false
        }
      },
      sourceMap: config.build.productionSourceMap,
      parallel: true
    }),
    // extract css into its own file
    new ExtractTextPlugin({
      filename: utils.assetsPath('css/[name].[chunkhash].css'),
      // filename:`[name]_[md5:contenthash:hex:8].css`,
      // Setting the following option to `false` will not extract CSS from codesplit chunks.
      // Their CSS will instead be inserted dynamically with style-loader when the codesplit chunk has been loaded by webpack.
      // It's currently set to `true` because we are seeing that sourcemaps are included in the codesplit bundle as well when it's `false`, 
      // increasing file size: https://github.com/vuejs-templates/webpack/issues/1110
      allChunks: true,
    }),
    // Compress extracted CSS. We are using this plugin so that possible
    // duplicated CSS from different components can be deduped.
    new OptimizeCSSPlugin({
      cssProcessorOptions: config.build.productionSourceMap
        ? { safe: true, map: { inline: false },autoprefixer: false }
        : { safe: true }
    }),
    // generate dist index.html with correct asset hash for caching.
    // you can customize output by editing /index.html
    // see https://github.com/ampedandwired/html-webpack-plugin
    new HtmlWebpackPlugin({
      filename: process.env.NODE_ENV === 'testing'
        ? 'index.html'
        : config.build.index,
      template: 'index.html',
      favicon: 'static/favicon.ico',
      inject: true,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true
        // more options:
        // https://github.com/kangax/html-minifier#options-quick-reference
      },
      // necessary to consistently work with multiple chunks via CommonsChunkPlugin
      chunksSortMode: 'dependency'
    }),
    // keep module.id stable when vendor modules does not change
    new webpack.HashedModuleIdsPlugin(),
    // enable scope hoisting
    new webpack.optimize.ModuleConcatenationPlugin(),
    // 将vendor js拆分为自己的文件。CommonsChunkPlugin用于提取多个入口文件共有的代码到单独的bundle中，以优化加载时间。
    // new webpack.optimize.CommonsChunkPlugin({
    //   name: 'vendor',
    //   minChunks (module) {
    //     // any required modules inside node_modules are extracted to vendor
    //     return ( module.resource && /\.js$/.test(module.resource) && module.resource.indexOf(path.join(__dirname, '../node_modules')) === 0 )
    //   }
    // }),
    // extract webpack runtime and module manifest to its own file in order to
    // prevent vendor hash from being updated whenever app bundle is updated
    // new webpack.optimize.CommonsChunkPlugin({
    //   name: 'manifest',
    //   minChunks: Infinity
    // }),
    // This instance extracts shared chunks from code splitted chunks and bundles them
    // in a separate chunk, similar to the vendor chunk
    // see: https://webpack.js.org/plugins/commons-chunk-plugin/#extra-async-commons-chunk
    // new webpack.optimize.CommonsChunkPlugin({
    //   name: 'app',
    //   async: 'vendor-async',
    //   children: true,
    //   minChunks: 3
    // }),

    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.build.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ]
})

哦可了，可以打包成功啦！