Sandbox

import {useState,useEffect} from 'react' 
export default function App() {
  const [n,sN]=useState('Guest')
  const [isM,sIsM]=useState(false)
  const cN=()=>sN('Friend')
  const cIsM=()=>sIsM(true)
  return (
    <>
    <h1>Hey {n} {isM ? '🤝' : '👋'}</h1>
    <button onClick={()=>[cN(),cIsM()]} style={{background:'#85A600',color:'#fff',cursor:isM||'pointer',opacity:!isM||0.5}} disabled={isM}>Meet</button>
    </>
  )
}