鼠年全馬鐵人挑戰 - React Hooks useState 2

useState2.js

import React, { useState } from 'react'

const Example = () => {
  // useState 採用 callBack Function，必要 return 一個值
  const [count, setCount] = useState(() => {
    return 0
  })

  return (
    <div>
      <p>You clicked {count} times</p>
      <button onClick={() => setCount(count + 1)}>
        Click me
      </button>
    </div>
  )
}