Web: storage

  <script>
    for(let b = 0; b < 10; ++b) {
      localStorage.setItem(`vault-${b}`, `vaunt-${b}`)
    }
    console.log(localStorage.length)
    localStorage.clear()
    console.log(localStorage.length)
    for(let b = 0; b < 5; ++b) {
      console.log(localStorage.getItem(`vault-${b}`))
    }
  </script>

<script>
    localStorage.clear()

    for(let b = 0; b < 5; ++b) {
      localStorage.setItem(`vault-${b}`, `vaunt-${b}`)
    }

    for(let b = 0; b < 10; ++b) {
      console.log(localStorage.key(b))  // 返回key
    }

    localStorage.bb = 5555555
    localStorage['tt'] = { tt: 55 }
    let bb = localStorage.getItem('bb')
    console.log(typeof bb)  // string
    let tt=localStorage.tt
    console.log(typeof tt,tt)
  </script>