ReactDOM
import React from 'react';import App from './App';React.ReactDOM.render(, document.getElementById('root'));复制代码
console报错render找不到,这是因为react已经把ReactDOM分离出来,这样引用会出错,改为
import React from 'react';import ReactDOM from 'react-dom';import App from './App';ReactDOM.render(, document.getElementById('root'));复制代码
后正常
return 错误
console错误信息
Nothing was returned from render. This usually means a return statement is missing. Or, to render nothing, return null复制代码
这是因为代码中return同一行没有代码
render(){ return () }复制代码App test
改为
render(){ return () }复制代码App test
后正常