feat(builder): allow to customize or disable minimizer plugins (#4018)

* feat(builder): allow to customize or disable minimizer plugins

* feat: support optimization.minimize

https://webpack.js.org/configuration/optimization/#optimization-minimize

* fix typos

lib/builder/webpack/client.js

@@ -99,11 +99,14 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
   extendConfig() {
     const config = super.extendConfig(...arguments)
 
-    if (!this.options.dev && !config.optimization.minimizer) {
+    // Add minimizer plugins
+    if (config.optimization.minimize && config.optimization.minimizer === undefined) {
       config.optimization.minimizer = []
 
       // https://github.com/webpack-contrib/terser-webpack-plugin
-      const terserJsPlugin = new TerserWebpackPlugin({
+      if (this.options.build.terser) {
+        config.optimization.minimizer.push(
+          new TerserWebpackPlugin(Object.assign({
             parallel: true,
             cache: this.options.build.cache,
             sourceMap: config.devtool && /source-?map/.test(config.devtool),
@@ -115,15 +118,17 @@ export default class WebpackClientConfig extends WebpackBaseConfig {
                 comments: /^\**!|@preserve|@license|@cc_on/
               }
             }
-      })
-      config.optimization.minimizer.push(terserJsPlugin)
+          }, this.options.build.terser))
+        )
+      }
 
       // https://github.com/NMFR/optimize-css-assets-webpack-plugin
       // https://github.com/webpack-contrib/mini-css-extract-plugin#minimizing-for-production
       // TODO: Remove OptimizeCSSAssetsPlugin when upgrading to webpack 5
-      if (this.options.build.extractCSS) {
-        const optimizeCSSPlugin = new OptimizeCSSAssetsPlugin({})
-        config.optimization.minimizer.push(optimizeCSSPlugin)
+      if (this.options.build.optimizeCSS) {
+        config.optimization.minimizer.push(
+          new OptimizeCSSAssetsPlugin(Object.assign({}, this.options.build.optimizeCSS))
+        )
       }
     }
 

lib/common/nuxt.config.js

@@ -87,8 +87,12 @@ export default {
     },
     styleResources: {},
     plugins: [],
+    terser: {},
+    optimizeCSS: undefined,
     optimization: {
       runtimeChunk: 'single',
+      minimize: undefined,
+      minimizer: undefined,
       splitChunks: {
         chunks: 'all',
         automaticNameDelimiter: '.',

lib/common/options.js

@@ -239,6 +239,16 @@ Options.from = function (_options) {
     options.build.extractCSS = false
   }
 
+  // Enable minimize for production builds
+  if (options.build.optimization.minimize === undefined) {
+    options.build.optimization.minimize = !options.dev
+  }
+
+  // Enable optimizeCSS only when extractCSS is enabled
+  if (options.build.optimizeCSS === undefined) {
+    options.build.optimizeCSS = options.build.extractCSS ? {} : false
+  }
+
   const loaders = options.build.loaders
   const vueLoader = loaders.vue
   if (vueLoader.productionMode === undefined) {