effects-doc-title-persist-two-effects.js

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

function Example() {
  // Read initial count from localStorage
  const [count, setCount] = useState(localStorage.getItem('count') || 0)

  // Similar to componentDidMount and componentDidUpdate:
  useEffect(() => {
    // Update the document title using the browser API
    document.title = `You clicked ${count} times`
  }, [count])
  
  // Similar to componentDidMount and componentDidUpdate:
  useEffect(() => {
    // Store count value after every render
    localStorage.setItem('count', count)
  }, [count])

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