qq_43248161的博客

输入命令 ​ npx create-react-app TodoList ​ 报错 Cannot create a project named "TodoList" because of npm naming restrictions: * name can no longer contain capital letters Please choose a different project name. 原因：脚手架项目名中不能含有大写字母 ...

报错 TypeError: Super expression must either be null or a function, not undefined 原因 class Person extends React.Component{ state={person:[ {id:1,name:'小张',age:18}, {id:2,name:'小李',age:19} ] }..