ReactDom.Render()方法应具有return语句

我在下面遇到了这个问题:

Line 5:  Your render method should have return statement  react/require-render-return

我假设ReactDom.render()在无状态组件上返回null。

import React from 'react';
import ReactDOM from 'react-dom';
import { BrowserRouter, Match, Miss } from 'react-router';
import SearchBar from './components/SearchBar.js'


const Root = () => {
    return(
        <div className="searchbar"> <SearchBar/> </div>
    )
}

ReactDOM.render(
  <Root />, document.querySelector('#searchbar')
)

谢谢!

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