【webpack】【错误记录】You may need an additional loader to handle the result of these loaders.

解决方法：
tsconfig.json
“jsx”: “preserve”
改为
“jsx”: “react”

出错文件：

import ReactDOM from 'react-dom';
import React from 'react';
const App = () => {
     
    return (
        <div>
            <h1>aaa</h1>
        </div>
    );
};
const root = document.getElementById('app');
ReactDOM.render(<App />, root);

报错:

ERROR in ./app/app.tsx 9:12
Module parse failed: Unexpected token (9:12)
File was processed with these loaders:
 * ./node_modules/ts-loader/index.js
You may need an additional loader to handle the result of these loaders.
| var react_1 = __importDefault(require("react"));
| var App = function () {
     
>     return (<div>
|             <h1>aaa</h1>
|         </div>);