index.js

import React from 'react'; import ReactDOM from 'react-dom'; import App from './App'; import './index.css'; import test from './Component/test'; ReactDOM.render( , document.getElementById('root') );

正确的 app.js

import React, { Component } from 'react'; import logo from './logo.svg'; require('./App.css'); class App extends Component { render() { return ( 
 
  
Welcome to React
 
 
 To get started, edit src/App.js and save to reload. 
 
 ); } } export default App;

错误的test.js

import React, { Component } from 'react'; import logo from '../logo.svg'; require('../App.css'); class App1 extends Component { render() { return ( 
 
  
Welcome to React
 
 
 To get started, edit src/App.js and save to reload. 
 
 ); } } export default App1;

都引入index.js test的 不能渲染 提示 warning 'test' is defined but never used no-unused-vars

help