你可以在JavaScript中使用beforeunload事件。

使用JavaScript，你可以这样做:

window.onbeforeunload = function() {
  localStorage.removeItem(key);
  return '';
};

这将在浏览器窗口/选项卡关闭之前删除键，并提示您确认关闭窗口/选项卡操作。我希望这能解决你的问题。

注意:onbeforeunload方法应该返回一个字符串。

您可以简单地使用sessionStorage。因为sessionStorage允许在浏览器窗口关闭时清除所有键值。

看这里:SessionStorage- MDN

There is a very specific use case in which any suggestion to use sessionStorage instead of localStorage does not really help. The use-case would be something as simple as having something stored while you have at least one tab opened, but invalidate it if you close the last tab remaining. If you need your values to be saved cross-tab and window, sessionStorage does not help you unless you complicate your life with listeners, like I have tried. In the meantime localStorage would be perfect for this, but it does the job 'too well', since your data will be waiting there even after a restart of the browser. I ended up using a custom code and logic that takes advantage of both.

I'd rather explain then give code. First store what you need to in localStorage, then also in localStorage create a counter that will contain the number of tabs that you have opened. This will be increased every time the page loads and decreased every time the page unloads. You can have your pick here of the events to use, I'd suggest 'load' and 'unload'. At the time you unload, you need to do the cleanup tasks that you'd like to when the counter reaches 0, meaning you're closing the last tab. Here comes the tricky part: I haven't found a reliable and generic way to tell the difference between a page reload or navigation inside the page and the closing of the tab. So If the data you store is not something that you can rebuild on load after checking that this is your first tab, then you cannot remove it at every refresh. Instead you need to store a flag in sessionStorage at every load before increasing the tab counter. Before storing this value, you can make a check to see if it already has a value and if it doesn't, this means you're loading into this session for the first time, meaning that you can do the cleanup at load if this value is not set and the counter is 0.

for (let i = 0; i < localStorage.length; i++) {
    if (localStorage.key(i).indexOf('the-name-to-delete') > -1) {
        arr.push(localStorage.key(i));
    }
}

for (let i = 0; i < arr.length; i++) {
    localStorage.removeItem(arr[i]);
}

您可以尝试以下代码删除本地存储:

delete localStorage.myPageDataArr;

    if(localStorage.getItem("visit") === null) {
      localStorage.setItem('visit', window.location.hostname);
      console.log(localStorage.getItem('visit'));
    } 
      else if(localStorage.getItem('visit') == 'localhost'){
            console.log(localStorage.getItem('visit'));
      }
    else {
     console.log(localStorage.getItem('visit'));
    }
   $(document).ready(function(){
      $("#clickme").click(function(){
         localStorage.setItem('visit', '0');
      });
   });  
   window.localStorage.removeItem('visit');