refactor build

build/webpack.prod.conf.js

@@ -1,28 +1,31 @@
-var path = require('path')
-var utils = require('./utils')
-var webpack = require('webpack')
-var config = require('../config')
-var merge = require('webpack-merge')
-var baseWebpackConfig = require('./webpack.base.conf')
-var CopyWebpackPlugin = require('copy-webpack-plugin')
-var HtmlWebpackPlugin = require('html-webpack-plugin')
-var ExtractTextPlugin = require('extract-text-webpack-plugin')
-var OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
+'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.conf')
+const CopyWebpackPlugin = require('copy-webpack-plugin')
+const HtmlWebpackPlugin = require('html-webpack-plugin')
+const ExtractTextPlugin = require('extract-text-webpack-plugin')
+const OptimizeCSSPlugin = require('optimize-css-assets-webpack-plugin')
+const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
 
-var env = config.build.env
-
-function resolveApp(relativePath) {
-    return path.resolve(relativePath);
+function resolve (dir) {
+  return path.join(__dirname, '..', dir)
 }
 
-var webpackConfig = merge(baseWebpackConfig, {
+const env = require('../config/prod.env')
+
+const webpackConfig = merge(baseWebpackConfig, {
   module: {
     rules: utils.styleLoaders({
       sourceMap: config.build.productionSourceMap,
-      extract: true
+      extract: true,
+      usePostCSS: true
     })
   },
-  devtool: config.build.productionSourceMap ? '#source-map' : false,
+  devtool: config.build.productionSourceMap ? config.build.devtool : false,
   output: {
     path: config.build.assetsRoot,
     filename: utils.assetsPath('js/[name].[chunkhash].js'),
@@ -33,22 +36,30 @@ var webpackConfig = merge(baseWebpackConfig, {
     new webpack.DefinePlugin({
       'process.env': env
     }),
-    new webpack.optimize.UglifyJsPlugin({
-      compress: {
-        warnings: false
+    new UglifyJsPlugin({
+      uglifyOptions: {
+        compress: {
+          warnings: false
+        }
       },
-      sourceMap: true
+      sourceMap: config.build.productionSourceMap,
+      parallel: true
     }),
     // extract css into its own file
     new ExtractTextPlugin({
-      filename: utils.assetsPath('css/[name].[contenthash].css')
+      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: {
-        safe: true
-      }
+      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
@@ -57,7 +68,8 @@ var webpackConfig = merge(baseWebpackConfig, {
       filename: config.build.index,
       template: 'index.html',
       inject: true,
-      favicon: resolveApp('favicon.ico'),
+      favicon: resolve('favicon.ico'),
+      title: 'vue-element-admin',
       minify: {
         removeComments: true,
         collapseWhitespace: true,
@@ -68,12 +80,14 @@ var webpackConfig = merge(baseWebpackConfig, {
       // necessary to consistently work with multiple chunks via CommonsChunkPlugin
       chunksSortMode: 'dependency'
     }),
-    // cache Module Identifiers
+    // keep module.id stable when vender modules does not change
     new webpack.HashedModuleIdsPlugin(),
+    // enable scope hoisting
+    new webpack.optimize.ModuleConcatenationPlugin(),
     // split vendor js into its own file
     new webpack.optimize.CommonsChunkPlugin({
       name: 'vendor',
-      minChunks: function (module, count) {
+      minChunks (module) {
         // any required modules inside node_modules are extracted to vendor
         return (
           module.resource &&
@@ -88,8 +102,18 @@ var webpackConfig = merge(baseWebpackConfig, {
     // prevent vendor hash from being updated whenever app bundle is updated
     new webpack.optimize.CommonsChunkPlugin({
       name: 'manifest',
-      chunks: ['vendor']
+      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([
       {
@@ -102,7 +126,7 @@ var webpackConfig = merge(baseWebpackConfig, {
 })
 
 if (config.build.productionGzip) {
-  var CompressionWebpackPlugin = require('compression-webpack-plugin')
+  const CompressionWebpackPlugin = require('compression-webpack-plugin')
 
   webpackConfig.plugins.push(
     new CompressionWebpackPlugin({
@@ -120,7 +144,7 @@ if (config.build.productionGzip) {
 }
 
 if (config.build.bundleAnalyzerReport) {
-  var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
+  const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin
   webpackConfig.plugins.push(new BundleAnalyzerPlugin())
 }