examples/web/index.web.js
import React from 'react';
import { render } from 'react-dom';
import App from '../common/App';
if (window.PaymentRequest) {
render(<App />, document.getElementById('app'));
// Don't render the app on Browsers that don't support PaymentRequest
} else {
document.write(
`Your browser doesn't <a href="https://caniuse.com/#search=PaymentRequest">support the PaymentRequest API</a>.`
);
}