API

import React, {useEffect, useState} from 'react';

function App() {
  const [state, setState] = useState<number | undefined>();

  useEffect(() => {
    fetch("url").then(res => res.json()).then(res => setState(res));
  }, [])

  if (!state) {
    return <div>...loading</div>
  }

  return <div>count from the api is: {state}</div>
}