How do I solve "Support for the experimental syntax 'jsx' isn't currently enabled"?

I wanted to make my website to an application. I ran npx create-react-app and I made a react app. Then, I did what was in expo. I ran expo install react-native-webview and I changed my app.js to

import * as React from 'react';
import { WebView } from 'react-native-webview';

export default class App extends React.Component {
  render() {
    return <WebView source={{ uri: 'https://expo.io' }} style={{ marginTop: 20 }} />;
  }
}

with my url. However when I did npm start there was an error like this:

node_modules\react-native-webview\lib\WebView.js:
    Support for the experimental syntax 'jsx' isn't currently enabled