角色菜单改造完成，去除权限管理，采用按钮方式显示在菜单管理中

src/components/Permission/index.js

@@ -0,0 +1,13 @@
+import permission from './permission'
+
+const install = function(Vue) {
+  Vue.directive('permission', permission)
+}
+
+if (window.Vue) {
+  window['permission'] = permission
+  Vue.use(install); // eslint-disable-line
+}
+
+permission.install = install
+export default permission

src/components/Permission/permission.js

@@ -0,0 +1,22 @@
+import store from '@/store'
+
+export default {
+  inserted(el, binding, vnode) {
+    const { value } = binding
+    const roles = store.getters && store.getters.roles
+
+    if (value && value instanceof Array && value.length > 0) {
+      const permissionRoles = value
+
+      const hasPermission = roles.some(role => {
+        return permissionRoles.includes(role)
+      })
+
+      if (!hasPermission) {
+        el.parentNode && el.parentNode.removeChild(el)
+      }
+    } else {
+      throw new Error(`need roles! Like v-permission="['admin','editor']"`)
+    }
+  }
+}