鼠年全馬鐵人挑戰 - React Hooks useEffect 1

useEffect1.js

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

const Example = (props) => {
  const [count, setCount] = useState(0);
  useEffect(() => {
    // 更新頁面標題
    document.title = `You clicked ${count} times`
  })
  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  )
}