Merge pull request #2081 from clarkdo/extract_css

feat: make extractCSS configurable

lib/builder/webpack/base.config.js

@@ -109,10 +109,13 @@ export default function webpackBaseConfig(name) {
   config.plugins.unshift(new TimeFixPlugin())
 
   // CSS extraction
-  if (this.options.build.extractCSS) {
-    config.plugins.push(new ExtractTextPlugin({
-      filename: this.options.build.filenames.css
-    }))
+  const extractCSS = this.options.build.extractCSS
+  if (extractCSS) {
+    const extractOptions = Object.assign(
+      { filename: this.options.build.filenames.css },
+      typeof extractCSS === 'object' ? extractCSS : {}
+    )
+    config.plugins.push(new ExtractTextPlugin(extractOptions))
   }
 
   // Workaround for hiding Warnings about plugins without a default export (#1179)

lib/builder/webpack/vue-loader.config.js

@@ -2,7 +2,7 @@ export default function vueLoader() {
   // https://vue-loader.vuejs.org/en
   const config = {
     postcss: this.options.build.postcss,
-    extractCSS: this.options.build.extractCSS,
+    extractCSS: !!this.options.build.extractCSS,
     cssSourceMap: this.options.build.cssSourceMap,
     preserveWhitespace: false,
     loaders: {