【Choosing the Type at Runtime】

　　You cannot use a general expression as the React element type. If you do want to use a general expression to indicate the type of the element, just assign it to a capitalized variable first. This often comes up when you want to render a different component based on a prop:

　　

　　To fix this, we will assign the type to a capitalized variable first:

　　

参考：https://facebook.github.io/react/docs/jsx-in-depth.html#user-defined-components-must-be-capitalized

Choosing the Type at Runtime的更多相关文章

  1. Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute'

    [TypeLoadException: Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from as ...

  2. Resource Path Location Type Target runtime Apache Tomcat v6.0 is not defined(项目报错)已解决

    我换了开发工具后,导入的项目不是这里报错就是那里不错.不过,我喜欢.在tomcat里面部署项目后,定位到报错行时,总是提示我这句话:Description Resource Path Location ...

  3. "Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b7

    1.错误背景 系统安装了.net framework4.0.4.5,项目先使用VS2013(4.5)开发,后来又重新用VS2010开发(4.0),运行时出现这个错误 2.错误原因 In .Net 4. ...

  4. Could not load type 'System.Runtime.CompilerServices.ExtensionAttribute' from assembly 'mscorlib 的一种情形

    没有引用任何.net 4.5的东西,也没有引用 Newtonsoft.dll,原因是引用了微软的tlb类型库,引用方法如 https://www.cnblogs.com/nanfei/p/108798 ...

  5. JavaScript 和 React，React用了大量语法糖，让JS编写更方便。

    https://reactjs.org/docs/higher-order-components.htmlhttps://codepen.io/gaearon/pen/WooRWa?editors=0 ...

  6. props & children

    一. choosing the type at runtime import React from 'react'; import { PhotoStory, VideoStory } from '. ...

  7. Run-time type information--RTTI

    In computer programming, run-time type information or run-time type identification (RTTI)[1] refers ...

  8. linux驱动程序之电源管理之Run-time PM 详解（4）

    Run-time PM. 每个device或者bus都会向run-time PM core注册3个callback   struct dev_pm_ops { ... int (*runtime_su ...

  9. Target runtime Apache Tomcat v6.0 is not defined. phyy Unknown Faceted Project Problem

    Description Resource Path Location TypeTarget runtime Apache Tomcat v6.0 is not defined. phyy Unknow ...

随机推荐

  1. spring揭密学习笔记(3)-spring ioc容器:掌管大局的IoC Service Provider

    1.IOC service Provider的概念.IoC Service Provider在这里是一个抽象出来的概念,它可以指代任何将IoC场景中的业务对象绑定到一起的实现方式.它可以是一段代码,也 ...

  2. PHP读取txt文件到数组

    $file_path = "test.txt"; if(file_exists($file_path)){ $file_arr = file($file_path); for($i ...

  3. oracle PL/SQL的介绍

    转自:http://blog.sina.com.cn/s/blog_4c302f060101i4o1.html 一 PL/SQL的介绍 1 PL/SQL是什么? PL/SQL(procedural l ...

  4. element 表格无法绑定服务返回数据

    无法直接绑定返回的Object属性,需要用js做一次对象转换后,才能绑定 <template> <div> <!--<button>添加服务器</but ...

  5. css3-animate

    常用动画设置: effect easing duration  effect: <select name="effects" id="effectTypes&quo ...

  6. epoll_wait 时 POLLERR 与 POLLIN 同时返回的现象解析(转)

    今天code review时,同事B对我代码中的poll()的处理做法提出了异议.于是做了些研究,还发现了一些好玩的故事. 异议的代码 我的代码是参考manpage写的,类似下面的做法.同事B说没有处 ...

  7. Java IO流学习总结五：转换流-InputStreamReader、OutputStreamWriter

    类的继承关系 Reader |__ BufferedReader.StringReader.InputStreamReader |__ FileReader Writer |__ BufferedWr ...

  8. DOTWeen 使用

    using UnityEngine; using System.Collections; using DG.Tweening; using UnityEngine.UI; public class T ...

  9. C++操作oracle数据库

    数据库操作方式:可以采用ADO方式,也可以采用oracle本身提供的Proc*C/C++或者是OCCI方式操作数据库.  连接方式:可以是客户端连接.也可以是服务器端连接.  数据库配置:无论是何种连 ...

  10. English Pronunciation Analysis | Advanced English Conversation

    English Pronunciation Analysis | Advanced English Conversation Share Tweet Share Tagged With: Ben Fr ...