Menu: fix setAttribute error

packages/menu/src/menu-mixin.js

 export default {
   computed: {
     indexPath() {
-      var path = [this.index];
-      var parent = this.$parent;
+      const path = [this.index];
+      let parent = this.$parent;
       while (parent.$options.componentName !== 'ElMenu') {
         if (parent.index) {
           path.unshift(parent.index);
@@ -12,7 +12,7 @@ export default {
       return path;
     },
     rootMenu() {
-      var parent = this.$parent;
+      let parent = this.$parent;
       while (
         parent &&
         parent.$options.componentName !== 'ElMenu'

packages/menu/src/menu.vue

@@ -262,9 +262,8 @@
       this.$on('item-click', this.handleItemClick);
       this.$on('submenu-click', this.handleSubmenuClick);
       if (this.mode === 'horizontal') {
-        let menu = new Menubar(this.$el); // eslint-disable-line
+        new Menubar(this.$el); // eslint-disable-line
       }
-
     }
   };
 </script>

src/utils/menu/aria-menubar.js

 import MenuItem from './aria-menuitem';
 
-var menu = function(domNode) {
+const Menu = function(domNode) {
   this.domNode = domNode;
   this.init();
 };
 
-menu.prototype.init = function() {
-  let menuChild = this.domNode.childNodes;
-  menuChild.forEach((child) => {
-    let menuItem = new MenuItem(child); // eslint-disable-line
+Menu.prototype.init = function() {
+  let menuChildren = this.domNode.childNodes;
+  [].filter.call(menuChildren, child => child.nodeType === 1).forEach(child => {
+    new MenuItem(child); // eslint-disable-line
   });
 };
-export default menu;
+export default Menu;

src/utils/menu/aria-menuitem.js

 import Utils from '../aria-utils';
 import SubMenu from './aria-submenu';
 
-var menuItem = function(domNode) {
+const MenuItem = function(domNode) {
   this.domNode = domNode;
   this.submenu = null;
   this.init();
 };
 
-menuItem.prototype.init = function() {
+MenuItem.prototype.init = function() {
   this.domNode.setAttribute('tabindex', '0');
   let menuChild = this.domNode.querySelector('.el-menu');
   if (menuChild) {
@@ -16,34 +16,34 @@ menuItem.prototype.init = function() {
   this.addListeners();
 };
 
-menuItem.prototype.addListeners = function() {
+MenuItem.prototype.addListeners = function() {
   const keys = Utils.keys;
   this.domNode.addEventListener('keydown', event => {
-    var prevdef = false;
+    let prevDef = false;
     switch (event.keyCode) {
       case keys.down:
         Utils.triggerEvent(event.currentTarget, 'mouseenter');
         this.submenu.gotoSubIndex(0);
-        prevdef = true;
+        prevDef = true;
         break;
       case keys.up:
         Utils.triggerEvent(event.currentTarget, 'mouseenter');
         this.submenu.gotoSubIndex(this.submenu.subMenuItems.length - 1);
-        prevdef = true;
+        prevDef = true;
         break;
       case keys.tab:
         Utils.triggerEvent(event.currentTarget, 'mouseleave');
         break;
       case keys.enter:
       case keys.space:
-        prevdef = true;
+        prevDef = true;
         event.currentTarget.click();
         break;
     }
-    if (prevdef) {
+    if (prevDef) {
       event.preventDefault();
     }
   });
 };
 
-export default menuItem;
+export default MenuItem;

src/utils/menu/aria-submenu.js

 import Utils from '../aria-utils';
 
-var Menu = function(parent, domNode) {
+const SubMenu = function(parent, domNode) {
   this.domNode = domNode;
   this.parent = parent;
   this.subMenuItems = [];
@@ -8,12 +8,12 @@ var Menu = function(parent, domNode) {
   this.init();
 };
 
-Menu.prototype.init = function() {
+SubMenu.prototype.init = function() {
   this.subMenuItems = this.domNode.querySelectorAll('li');
   this.addListeners();
 };
 
-Menu.prototype.gotoSubIndex = function(idx) {
+SubMenu.prototype.gotoSubIndex = function(idx) {
   if (idx === this.subMenuItems.length) {
     idx = 0;
   } else if (idx < 0) {
@@ -23,31 +23,31 @@ Menu.prototype.gotoSubIndex = function(idx) {
   this.subIndex = idx;
 };
 
-Menu.prototype.addListeners = function() {
+SubMenu.prototype.addListeners = function() {
   const keys = Utils.keys;
   const parentNode = this.parent.domNode;
   Array.prototype.forEach.call(this.subMenuItems, el => {
     el.addEventListener('keydown', event => {
-      let prevdef = false;
+      let prevDef = false;
       switch (event.keyCode) {
         case keys.down:
           this.gotoSubIndex(this.subIndex + 1);
-          prevdef = true;
+          prevDef = true;
           break;
         case keys.up:
           this.gotoSubIndex(this.subIndex - 1);
-          prevdef = true;
+          prevDef = true;
           break;
         case keys.tab:
           Utils.triggerEvent(parentNode, 'mouseleave');
           break;
         case keys.enter:
         case keys.space:
-          prevdef = true;
+          prevDef = true;
           event.currentTarget.click();
           break;
       }
-      if (prevdef) {
+      if (prevDef) {
         event.preventDefault();
         event.stopPropagation();
       }
@@ -56,4 +56,4 @@ Menu.prototype.addListeners = function() {
   });
 };
 
-export default Menu;
+export default SubMenu;