鼠年全馬鐵人挑戰 - React Hooks useEffect 5

useEffect5.js

const App = () => {
  const [count, setCount] = useState(0)
  
  useEffect(() => {
    // 副作用邏輯
   document.title = `You clicked ${count} times`;
  }, [count])
  
  useEffect(() => {
    console.log(count)
  })
  
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div> 
  )
}