fix noop

components/_util/warning.js

@@ -2,8 +2,10 @@ import warning from 'warning'
 
 const warned = {}
 export default (valid, message) => {
-  if (!valid && !warned[message]) {
+  if (process.env.NODE_ENV !== 'production') {
-    warning(false, message)
+    if (!valid && !warned[message]) {
-    warned[message] = true
+      warning(false, message)
+      warned[message] = true
+    }
   }
 }

components/tabs/TabBarMixin.js

@@ -1,4 +1,6 @@
 import Icon from '../icon'
+function noop () {
+}
 export default {
   props: {
     prefixCls: {
@@ -11,11 +13,11 @@ export default {
     },
     disabled: Boolean,
     onKeyDown: {
-      default: () => {},
+      default: noop,
       type: Function,
     },
     onTabClick: {
-      default: () => {},
+      default: noop,
       type: Function,
     },
     activeKey: String,
@@ -23,11 +25,11 @@ export default {
     extraContent: [String, Number, Function],
     hideAdd: Boolean,
     removeTab: {
-      default: () => {},
+      default: noop,
       type: Function,
     },
     createNewTab: {
-      default: () => {},
+      default: noop,
       type: Function,
     },
   },

components/tabs/Tabs.vue

@@ -22,6 +22,8 @@ function activeKeyIsValid (t, key) {
   })
   return key !== undefined && keys.indexOf(key) >= 0
 }
+function noop () {
+}
 export default {
   name: 'Tabs',
   components: { Icon },
@@ -50,8 +52,8 @@ export default {
         return ['line', 'card', 'editable-card'].includes(value)
       },
     },
-    onChange: { type: Function, default: () => {} },
+    onChange: { type: Function, default: noop },
-    onTabClick: { type: Function, default: () => {} },
+    onTabClick: { type: Function, default: noop },
   },
   data () {
     return {