window.localStorage.getItem() 和 window.sessionStorage.getItem() 返回 null

你好，我刚开始学习js。

window.localStorage.getItem()并window.sessionStorage.getItem()返回null，尽管如果您在 chrome 中使用应用程序，则存在值 \u200b\u200bare。

let startBtn = document.getElementById("startBtn")
startBtn.onclick = game;
document.getElementById('clearBR').addEventListener('click', ClearBestResult)
document.getElementById('clearBRforAllTime').addEventListener('click', ClearBestResultForAllTime)
let result
function game() {
   let count = 0
   const nickname = document.getElementById("nickname").value
   document.getElementById('click').addEventListener('click', clickCount)
   let arr = []
   function clickCount() {
      count++
      arr.push(count)
   }
   try {
      if (nickname === "") throw new Error()
   } catch (e) {
      alert('nickname is empty')
   }
   finally {
      setTimeout(function () {
         result = arr.length
         alert(`You clicked ${result} times`)
         if (sessionStorage.getItem, (nickname, result) < result || sessionStorage.getItem, (nickname, result) === undefined) {
            sessionStorage.clear()
            sessionStorage.setItem(nickname, result.toString())
         } else if (result > localStorage.getItem, (nickname, result) || localStorage.getItem === undefined) {
            localStorage.clear()
            localStorage.setItem(nickname, result.toString())
         }
         count = 0
         arr.splice(0, arr.length);
      }, 5000);
   }
   document.getElementById('BRforAllTime').addEventListener('click', bestForAllTimes)
   document.getElementById('BR').addEventListener('click', bestResult)
   function bestForAllTimes() {
      alert(`Best result for the whole time is: ${localStorage.getItem(result)} by ${localStorage.getItem("nickname")}`)
   }
   function bestResult() {
      alert(`Best result is ${window.sessionStorage.getItem(result)}`)
   }
   console.log(sessionStorage.getItem(result)) // null
   console.log(localStorage.getItem(result)) //null
}
function ClearBestResult() {
   window.sessionStorage.clear()
   alert('Best result is cleared')
}
function ClearBestResultForAllTime() {
   localStorage.clear()
   alert('Best result for the whole time is cleared')
}