[TOC] >[success] # 數組的filter()過濾方法 js中數組的filter（）可以按照條件過濾返回一個新的數組，例如你又一個需求，需要按照角色權限顯示菜單，菜單是個數組的格式如下： <br/> ~~~ var menuList= [ { "code": "SYS100", "title": "數據管理", "icon": "bimicon-zuzhiguanli", "children": [{ "code": "SYS110", "title": "基礎數據", "icon": "bimicon-zuzhi" }] }, { "code": "SYS200", "title": "業務管理", "icon": "bimicon-biaodan" }, { "code": "SYS400", "title": "APP管理", "icon": "bimicon-shebei", "children": [{ "code": "SYS410", "title": "版本管理", "icon": "bimicon-gongchengjiegou", "componentPath": "@/pages/app-management/VersionManagement" }] }] ~~~ 現在如果是管理員角色就顯示APP管理這個菜單其他角色不顯示這個菜單，代碼如下： ~~~ menuList ( ) { let isAdmin = true // 非管理員 if(!isAdmin){ menuList = menuList.filter(item => { return item.code !== 'SYS410' }) } } 返回結果為： [{ "code": "SYS100", "title": "數據管理", "icon": "bimicon-zuzhiguanli", "children": [{ "code": "SYS110", "title": "基礎數據", "icon": "bimicon-zuzhi" }] }, { "code": "SYS200", "title": "業務管理", "icon": "bimicon-biaodan" }] ~~~