React报错:Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.

React报错:

报错原因List.Item的Item写成了item,小写的i

原文地址:https://www.cnblogs.com/nayek/p/12370052.html

时间: 2024-10-09 04:45:53

React报错:Error: Element type is invalid: expected a string (for built-in components) or a class/function (for composite components) but got: undefined.的相关文章

ReactJs 报错 Element type is invalid: expected a string (from built-in components) or a class/function (for composite components) but got: undefined. Check the render method of `Me`.

今天在重构一个页面的时候,碰到了一个error,具体的error信息如下图中所示: 最后经过一番查找定位,终于找到了问题所在,原因就是在父组件引用子组件时多加了一个大括号. import {Chart} from 'Chart'; 把{}去掉就可以了.

在vmware里用ubuntu,报错 error: elf header smaller than expected

一.打开VMware,点中要修复的虚拟机,右键选择设置,硬件->cd/dvd: 在使用ISO映像文件里选择之前下载的系统安装文件.点击确定. 二.BOIS设置:虚拟机->电源->启动时进入BOIS,在boot选项卡里. ,选择cd,按-/+把cd-rom移动到第一位 然后,按F10,选择yes,保存重启. 三.修复: 点击Try Ubuntu,进入桌面,在左上角输入terminal,打开终端. 在终端输入: sudo add-apt-repository ppa:yannubuntu/b

POST提交时总是报错: {"errcode":40017,"errmsg":"invalid button type"} 解决办法

开发语言:java 开发内容:微信公众号 自定义菜单 开发该连接的项目:点击打开链接 http://blog.csdn.net/blognkliming/article/details/16803093 执行MenuManage.java时报错: POST提交时总是报错:  {"errcode":40017,"errmsg":"invalid button type"} 网上找了很多资料,都没有解决问题.最后,在查看代码时发现,MenuManag

发布报错:Error ITMS-90635 - Invalid Mach-O in bundle - submitting to App store

发布报错:Error ITMS-90635 - Invalid Mach-O in bundle - submitting to App store 昨晚上传项目到AppStore,报了这个错,纳尼!?我早上还能成功上传的,当时判断是晚上网速问题导致的,早上再次试了下,还是一样报错,因为CocoPods导入的框架bitCode不一致导致的,解决方案是在Podfile后面加上 post_install do |installer| installer.pods_project.targets.ea

python安装locustio报错error: invalid command 'bdist_wheel'的解决方法

locust--scalable user load testing tool writen in Python(是用python写的.规模化.可扩展的测试性能的工具) 安装locustio需要的环境条件是:Python2.6+,但是不支持Python3. 今天在cmd里运行pip install locustio,报错提示:error: invalid command 'bdist_wheel'. 原因:pip和setuptools的版本较低. 解决方案:升级pip和setuptools. 一

web.xml文件报错:cvc-complex-type.2.4.a: Invalid content was found starting with element 'init-param'.

cvc-complex-type.2.4.a: Invalid content was found starting with element 'init-param'. One of '{"http:// xmlns.jcp.org/xml/ns/javaee":enabled, "http://xmlns.jcp.org/xml/ns/javaee":async-supported, "http:// xmlns.jcp.org/xml/ns/java

安装MySQL-python报错error: command 'gcc' failed with exit status 1

[[email protected] MySQL-python-1.2.3]# python setup.py install function) .... _mysql.c:133: error: 'ER_SYNTAX_ERROR' undeclared (first use in this function) _mysql.c:380: error: '_mysql_ConnectionObject' has no member named 'connection' _mysql.c:382

mysql导入报错 ERROR 1286 (42000) at line 1: Unknown table engine 'InnoDB'

[[email protected] mysql]# mysql -u root -p'123456'  jiang < schema.sql                 ERROR 1286 (42000) at line 1: Unknown table engine 'InnoDB' mysql> select * from ENGINES; +------------+---------+-----------------------------------------------

源码安装mysql5.6x启动报错:[ERROR] Can&#39;t find messagefile &#39;/data/mysqldata/3306/english/errmsg.sys&#39;

170502 10:43:40 mysqld_safe Starting mysqld daemon with databases from /data/mysqldata/3306/data 2017-05-02 10:43:40 0 [Warning] The syntax '--language/-l' is deprecated and will be removed in a future release. Please use '--lc-messages-dir' instead.