Fix compilation errors on production

babel.config.js

@@ -1,18 +1,20 @@
-module.exports = function(api) {
-  var validEnv = ['development', 'test', 'production']
-  var currentEnv = api.env()
-  var isDevelopmentEnv = api.env('development')
-  var isProductionEnv = api.env('production')
-  var isTestEnv = api.env('test')
+/* eslint-disable global-require */
+
+module.exports = api => {
+  const validEnv = ['development', 'test', 'production'];
+  const currentEnv = api.env();
+  const isDevelopmentEnv = api.env('development');
+  const isProductionEnv = api.env('production');
+  const isTestEnv = api.env('test');
 
   if (!validEnv.includes(currentEnv)) {
     throw new Error(
-      'Please specify a valid `NODE_ENV` or ' +
+      `${'Please specify a valid `NODE_ENV` or ' +
         '`BABEL_ENV` environment variables. Valid values are "development", ' +
-        '"test", and "production". Instead, received: ' +
-        JSON.stringify(currentEnv) +
-        '.'
-    )
+        '"test", and "production". Instead, received: '}${JSON.stringify(
+        currentEnv
+      )}.`
+    );
   }
 
   return {
@@ -21,9 +23,9 @@ module.exports = function(api) {
         require('@babel/preset-env').default,
         {
           targets: {
-            node: 'current'
-          }
-        }
+            node: 'current',
+          },
+        },
       ],
       (isProductionEnv || isDevelopmentEnv) && [
         require('@babel/preset-env').default,
@@ -32,9 +34,9 @@ module.exports = function(api) {
           useBuiltIns: 'entry',
           corejs: 3,
           modules: false,
-          exclude: ['transform-typeof-symbol']
-        }
-      ]
+          exclude: ['transform-typeof-symbol'],
+        },
+      ],
     ].filter(Boolean),
     plugins: [
       require('babel-plugin-macros'),
@@ -44,32 +46,30 @@ module.exports = function(api) {
       [
         require('@babel/plugin-proposal-class-properties').default,
         {
-          loose: true
-        }
+          loose: true,
+        },
       ],
       [
         require('@babel/plugin-proposal-object-rest-spread').default,
         {
-          useBuiltIns: true
-        }
+          useBuiltIns: true,
+        },
       ],
       [
         require('@babel/plugin-transform-runtime').default,
         {
           helpers: false,
           regenerator: true,
-          corejs: false
-        }
+          corejs: false,
+        },
       ],
       [
         require('@babel/plugin-transform-regenerator').default,
         {
-          async: false
-        }
+          async: false,
+        },
       ],
-      [
-        require('babel-plugin-transform-vue-jsx')
-      ]
-    ].filter(Boolean)
-  }
-}
+      [require('babel-plugin-transform-vue-jsx')],
+    ].filter(Boolean),
+  };
+};