webpack.prod.js

'use strict'
const path = require('path')
const utils = require('./utils')
const webpack = require('webpack')
const config = require('./config')
const merge = require('webpack-merge')
const baseWebpackConfig = require('./webpack.base')
const CopyWebpackPlugin = require('copy-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
// const loading = require('./render-loading') // 事先设计好的 loading 图
// const ExtractTextPlugin = require('extract-text-webpack-plugin')
const MiniCssExtractPlugin = require('mini-css-extract-plugin')
const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')

const { VueLoaderPlugin } = require('vue-loader')

const env = require('./config/prod.env')

const webpackConfig = merge(baseWebpackConfig, {
  mode: 'production',
  module: {
    rules: utils.styleLoaders({
      sourceMap: config.build.productionSourceMap,
      extract: true,
      usePostCSS: true
    })
  },
  performance: {
    hints: "warning", //枚举
    maxAssetSize: 200000, //整数类型 (字节为单位)
    maxEntrypointSize: 400000, //整数类型 (字节为单位)
    assertFilter: function(assetFilename){
      // 提供资源文件名的断言函数
      return assetFilename.endsWith('.css') || assetFilename.endsWith('.js');
    }
  },
  devtool: config.build.productionSourceMap ? config.build.devtool : false,
  // 通过在浏览器调试工具(browser devtools)中添加元信息(meta info)增强调试
  // 牺牲了构建速度的 `source-map' 是最详细的。
  output: {
    publicPath: './',
    path: config.build.assetsRoot,
    filename: utils.assetsPath('js/[name].[chunkhash:8].js'),
    chunkFilename: utils.assetsPath('js/[id].[chunkhash:8].chunk.js'),
    chunkLoadTimeout: 120000, //默认 请求到期之前的毫秒数
  },
  plugins: [
    // http://vuejs.github.io/vue-loader/en/workflow/production.html
    new VueLoaderPlugin(),
    new webpack.DefinePlugin({
      'process.env': env
    }),
    new UglifyJsPlugin({
      uglifyOptions: {
        compress: {
          // warnings: false,
          // pure_funcs: ['console.log']
        }
      },
      sourceMap: config.build.productionSourceMap,
      parallel: true
    }),
    new MiniCssExtractPlugin({
      filename: 'css/app.[name].css',
      chunkFilename: 'css/app.[contenthash:12].css'  // use contenthash *
    }),
    // extract css into its own file
    // new ExtractTextPlugin({
    //   filename: utils.assetsPath('css/[name].[contenthash].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 } }
        : { 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: config.build.index,
      template: 'index.html',
      inject: true,
      minify: {
        removeComments: true,
        collapseWhitespace: true,
        removeAttributeQuotes: true,
        // more options:
        // loading: loading,
        // 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(),
    // split vendor js into its own file


    // copy custom static assets
    new CopyWebpackPlugin([
      {
        from: path.resolve(__dirname, '../static'),
        to: config.build.assetsSubDirectory,
        ignore: ['.*']
      }
    ])
  ],
  optimization: {
    runtimeChunk: {
      name: 'manifest'
    },
    minimizer: [
      new UglifyJsPlugin({
        cache: true,
        parallel: true,
        sourceMap: config.build.productionSourceMap,
        uglifyOptions: {
          warnings: false
        }
      }),
      new OptimizeCSSPlugin({
        cssProcessorOptions: config.build.productionSourceMap
          ? { safe: true, map: { inline: false } }
          : { safe: true }
      }),
    ],
    splitChunks: {
      chunks: 'async',
      minSize: 30000,
      minChunks: 1,
      maxAsyncRequests: 5,
      maxInitialRequests: 3,
      automaticNameDelimiter: '~',   // 打包分割符
      name: true,
      cacheGroups: {
        vendor: {
          name: 'vendor',
          chunks: 'initial',
          priority: -10,
          enforce: true,
          reuseExistingChunk: true,   // 可设置是否重用已用chunk 不再创建新的chunk
          test: /node_modules\/(.*)\.js/, //打包第三方库
        },
        common: { // 打包其余的的公共代码
          minChunks: 2, // 引入两次及以上被打包
          name: 'common', // 分离包的名字
          chunks: 'all',
          priority: 5,
        },
        styles: {
          name: 'styles',
          test: /\.(scss|css)$/,
          chunks: 'all',
          minChunks: 1,
          reuseExistingChunk: true,
          enforce: true
        },
      }
    }
  }

})

if (config.build.productionGzip) {
  const CompressionWebpackPlugin = require('compression-webpack-plugin')

  webpackConfig.plugins.push(
    new CompressionWebpackPlugin({
      asset: '[path].gz[query]',
      algorithm: 'gzip',
      test: new RegExp(
        '\\.(' +
        config.build.productionGzipExtensions.join('|') +
        ')$'
      ),
      threshold: 10240,
      minRatio: 0.8
    })
  )
}

if (config.build.bundleAnalyzerReport) {
  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
  webpackConfig.plugins.push(new BundleAnalyzerPlugin())
}

module.exports = webpackConfig