TypeScriptFullStackShell/src/public/react/demo-react/src/App.tsx

App.tsx

import React, { Component } from 'react';
import logo from './logo.svg';
import './App.css';

class App extends Component {

  render() {

    async function callExpress() {
      try {
        let response = await fetch('/api/say-hello/SeanMaxwell')
                              .then(res => res.json());
        alert('Hi this is a response from the backend: ' + response.response);
      } catch (err) {
        alert(err);
      }
    }

    callExpress();
    
    ...