import $ from 'jquery';import {useState, useEffect} from 'react';function App() {
   const [n, setN] = useState(0);
   useEffect(()=>{
       $("button").on('click', ()=>{
          setN(n=>(n+1));
       })
   },[])
   return (
      <button>{n}</button>
   );}export default App;