build/webpack.base.conf.js

@@ -30,7 +30,7 @@ module.exports = {
     }
   },
   resolve: {
-    extensions: ['.js', '.jsx', '.vue'],
+    extensions: ['.js', '.jsx', '.vue', '.mjs'],
     modules: [
       path.join(__dirname, '../node_modules')
     ],
@@ -68,6 +68,11 @@ module.exports = {
           path.resolve(__dirname, '../src/i18n')
         ]
       },
+      {
+          test: /\.mjs$/,
+          include: /node_modules/,
+          type: "javascript/auto"
+      },
       {
         test: /\.vue$/,
         loader: 'vue-loader',

package.json

@@ -56,7 +56,7 @@
     "@vue/babel-helper-vue-jsx-merge-props": "1.2.1",
     "@vue/babel-plugin-jsx": "1.1.1",
     "@vue/compiler-sfc": "^3.1.0",
-    "@vue/test-utils": "2.0.0-rc.17",
+    "@vue/test-utils": "^2.0.2",
     "autoprefixer": "6.7.7",
     "babel-eslint": "7.2.3",
     "babel-loader": "8.2.4",