replace _componentTag to componentName

packages/checkbox/src/checkbox-group.vue

@@ -4,6 +4,8 @@
   export default {
     name: 'ElCheckboxGroup',
 
+    componentName: 'ElCheckboxGroup',
+
     mixins: [Emitter],
 
     props: {

packages/checkbox/src/checkbox.vue

@@ -85,7 +85,7 @@
     data() {
       return {
         focus: false,
-        wrapInGroup: this.$parent.$options._componentTag === 'el-checkbox-group'
+        wrapInGroup: this.$parent.$options.componentName === 'ElCheckboxGroup'
       };
     },
 

packages/menu/src/menu-item-group.vue

@@ -1,8 +1,8 @@
 <script>
   module.exports = {
-    name: 'el-menu-item-group',
+    name: 'ElMenuItemGroup',
 
-    componentName: 'menu-item-group',
+    componentName: 'ElMenuItemGroup',
 
     props: {
       title: {
@@ -19,14 +19,14 @@
       initPadding() {
         var parent = this.$parent;
         var level = 0;
-        var componentTag = parent.$options._componentTag;
+        var component = parent.$options.componentName;
 
-        while (componentTag !== 'el-menu') {
-          if (componentTag === 'el-submenu') {
+        while (component !== 'ElMenu') {
+          if (component === 'ElSubmenu') {
             level++;
           }
           parent = parent.$parent;
-          componentTag = parent.$options._componentTag;
+          component = parent.$options.componentName;
         }
         this.paddingLeft += level * 10;
       }

packages/menu/src/menu-item.vue

@@ -1,9 +1,9 @@
 <script>
   import Menu from './menu-mixin';
   module.exports = {
-    name: 'el-menu-item',
+    name: 'ElMenuItem',
 
-    componentName: 'menu-item',
+    componentName: 'ElMenuItem',
 
     mixins: [Menu],
 

packages/menu/src/menu-mixin.js

@@ -3,7 +3,7 @@ module.exports = {
     indexPath() {
       var path = [this.index];
       var parent = this.$parent;
-      while (parent.$options._componentTag !== 'el-menu') {
+      while (parent.$options.componentName !== 'ElMenu') {
         if (parent.index) {
           path.unshift(parent.index);
         }
@@ -13,7 +13,7 @@ module.exports = {
     },
     rootMenu() {
       var parent = this.$parent;
-      while (parent.$options._componentTag !== 'el-menu') {
+      while (parent.$options.componentName !== 'ElMenu') {
         parent = parent.$parent;
       }
       return parent;

packages/menu/src/menu.vue

@@ -14,7 +14,7 @@
   export default {
     name: 'ElMenu',
 
-    componentName: 'menu',
+    componentName: 'ElMenu',
 
     mixins: [emitter],
 
@@ -91,7 +91,7 @@
         this.$emit('select', index, indexPath, instance);
 
         if (this.mode === 'horizontal') {
-          this.broadcast('submenu', 'item-select', [index, indexPath]);
+          this.broadcast('ElSubmenu', 'item-select', [index, indexPath]);
           this.openedMenus = [];
         } else {
           this.openActiveItemMenus();

packages/menu/src/submenu.vue

@@ -25,9 +25,9 @@
   import menuMixin from './menu-mixin';
 
   module.exports = {
-    name: 'el-submenu',
+    name: 'ElSubmenu',
 
-    componentName: 'submenu',
+    componentName: 'ElSubmenu',
 
     mixins: [menuMixin],