样式丢失

.babelrc

@@ -7,11 +7,17 @@
       }
     }],
     "stage-2"
-  ]
-  // "plugins": ["transform-vue-jsx", "transform-runtime",
-  //   ["import", {
-  //   "libraryName": "vant",
-  //   "libraryDirectory": "es",
-  //   "style": true
-  // }]]
+  ],
+  "plugins": ["transform-vue-jsx", "transform-runtime",
+    ["import", {
+      "libraryName": "vant",
+      "libraryDirectory": "es",
+      "style": true
+    }]],
+  "env": {
+    "test": {
+      "presets": ["env", "stage-2"],
+      "plugins": ["transform-vue-jsx", "istanbul"]
+    }
+  }
 }

build/webpack.prod.conf.js

@@ -39,7 +39,7 @@ const webpackConfig = merge(baseWebpackConfig, {
         }
       },
       sourceMap: config.build.productionSourceMap,
-      parallel: false
+      parallel: true
     }),
     // extract css into its own file
     new ExtractTextPlugin({