reactjs安装并在脚手架中使用 material-ui/core

npm install @material-ui/core

import Button from '@material-ui/core/Button';

function App1() {
  return <Button variant="contained">你好，世界</Button>;
}

export default App1

引入：

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App1 from './MuiDemo';
import reportWebVitals from './reportWebVitals';

ReactDOM.render(
  <React.StrictMode>
    <App1 />
  </React.StrictMode>,
  document.getElementById('root')
);

// If you want to start measuring performance in your app, pass a function
// to log results (for example: reportWebVitals(console.log))
// or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
reportWebVitals();

官方链接：https://mui.com/zh/getting-started/usage/