虽然本地存储不提供过期机制，但cookie提供。只需将本地存储密钥与cookie配对，就可以简单地确保本地存储可以使用与cookie相同的过期参数进行更新。

jQuery中的例子:

if (!$.cookie('your_key') || !localStorage.getItem('your_key')) {
    //get your_data from server, then...
    localStorage.setItem('your_key', 'your_data' );
    $.cookie('your_key', 1);
} else {
    var your_data = localStorage.getItem('your_key');
}
// do stuff with your_data

本例将cookie设置为默认参数，在浏览器关闭时过期。因此，当浏览器关闭并重新打开时，服务器端调用将刷新your_data的本地数据存储。

注意，这与删除本地数据存储并不完全相同，而是在cookie过期时更新本地数据存储。但是，如果您的主要目标是能够存储超过4K的客户端(cookie大小的限制)，那么cookie和本地存储的这种配对将帮助您使用与cookie相同的过期参数来实现更大的存储大小。

这里强烈推荐使用sessionStorage

它与localStorage相同，但在会话销毁/浏览器关闭时销毁 此外，localStorage可以在选项卡之间共享，而sessionStorage只能在当前选项卡中使用，但值不会在刷新页面或更改页面时改变 sessionStorage对于减少cookie的网络流量也很有用

用于设置值使用

sessionStorage.setItem("key","my value");

获取值使用

var value = sessionStorage.getItem("key");

点击这里查看API

集合的所有方式都是

  sessionStorage.key = "my val";
  sessionStorage["key"] = "my val";
  sessionStorage.setItem("key","my value");

所有得到的方法都是

  var value = sessionStorage.key;
  var value = sessionStorage["key"];
  var value = sessionStorage.getItem("key");

// Functions
function removeHtmlStorage(name) {
    localStorage.removeItem(name);
    localStorage.removeItem(name+'_time');
}

function setHtmlStorage(name, value, expires) {

    if (expires==undefined || expires=='null') { var expires = 3600; } // default: 1h

    var date = new Date();
    var schedule = Math.round((date.setSeconds(date.getSeconds()+expires))/1000);

    localStorage.setItem(name, value);
    localStorage.setItem(name+'_time', schedule);
}

function statusHtmlStorage(name) {

    var date = new Date();
    var current = Math.round(+date/1000);

    // Get Schedule
    var stored_time = localStorage.getItem(name+'_time');
    if (stored_time==undefined || stored_time=='null') { var stored_time = 0; }

    // Expired
    if (stored_time < current) {

        // Remove
        removeHtmlStorage(name);

        return 0;

    } else {

        return 1;
    }
}

// Status
var cache_status = statusHtmlStorage('cache_name');

// Has Data
if (cache_status == 1) {

    // Get Cache
    var data = localStorage.getItem('cache_name');
    alert(data);

// Expired or Empty Cache
} else {

    // Get Data
    var data = 'Pay in cash :)';
    alert(data);

    // Set Cache (30 seconds)
    if (cache) { setHtmlStorage('cache_name', data, 30); }

}

你可以试试这个。

var hours = 24; // Reset when storage is more than 24hours
var now = Date.now();
var setupTime = localStorage.getItem('setupTime');
if (setupTime == null) {
     localStorage.setItem('setupTime', now)
} else if (now - setupTime > hours*60*60*1000) {
    localStorage.clear()
    localStorage.setItem('setupTime', now);
}

使用angular和local饲草的解决方案:

angular.module('app').service('cacheService', function() {

  return {
    set: function(key, value, expireTimeInSeconds) {
      return localforage.setItem(key, {
        data: value,
        timestamp: new Date().getTime(),
        expireTimeInMilliseconds: expireTimeInSeconds * 1000
      })
    },
    get: function(key) {
      return localforage.getItem(key).then(function(item) {
        if(!item || new Date().getTime() > (item.timestamp + item.expireTimeInMilliseconds)) {
          return null
        } else {
          return item.data
        }
      })
    }
  }

})

Brynner Ferreira提出了一个很好的观点:在过期信息所在的地方存储一个兄弟密钥。这样，如果你有大量的键，或者你的值是大型Json对象，你不需要解析它们来访问时间戳。

以下是一个改进版本:

 /*  removeStorage: removes a key from localStorage and its sibling expiracy key
    params:
        key <string>     : localStorage key to remove
    returns:
        <boolean> : telling if operation succeeded
 */
 function removeStorage(name) {
    try {
        localStorage.removeItem(name);
        localStorage.removeItem(name + '_expiresIn');
    } catch(e) {
        console.log('removeStorage: Error removing key ['+ key + '] from localStorage: ' + JSON.stringify(e) );
        return false;
    }
    return true;
}
/*  getStorage: retrieves a key from localStorage previously set with setStorage().
    params:
        key <string> : localStorage key
    returns:
        <string> : value of localStorage key
        null : in case of expired key or failure
 */
function getStorage(key) {

    var now = Date.now();  //epoch time, lets deal only with integer
    // set expiration for storage
    var expiresIn = localStorage.getItem(key+'_expiresIn');
    if (expiresIn===undefined || expiresIn===null) { expiresIn = 0; }

    if (expiresIn < now) {// Expired
        removeStorage(key);
        return null;
    } else {
        try {
            var value = localStorage.getItem(key);
            return value;
        } catch(e) {
            console.log('getStorage: Error reading key ['+ key + '] from localStorage: ' + JSON.stringify(e) );
            return null;
        }
    }
}
/*  setStorage: writes a key into localStorage setting a expire time
    params:
        key <string>     : localStorage key
        value <string>   : localStorage value
        expires <number> : number of seconds from now to expire the key
    returns:
        <boolean> : telling if operation succeeded
 */
function setStorage(key, value, expires) {

    if (expires===undefined || expires===null) {
        expires = (24*60*60);  // default: seconds for 1 day
    } else {
        expires = Math.abs(expires); //make sure it's positive
    }

    var now = Date.now();  //millisecs since epoch time, lets deal only with integer
    var schedule = now + expires*1000; 
    try {
        localStorage.setItem(key, value);
        localStorage.setItem(key + '_expiresIn', schedule);
    } catch(e) {
        console.log('setStorage: Error setting key ['+ key + '] in localStorage: ' + JSON.stringify(e) );
        return false;
    }
    return true;
}