javascript - 在 Javascript 中检查新访客

Question

我也在尝试寻找一种简洁的方法来查看我网站的用户最近是否访问过。我需要在 javascript 中完成此操作(由于缓存)，并且我想出了下面的代码。有没有更清洁的方法来做到这一点，即。更少的代码行:)

function createCookie(name,value,days) {
    if (days) 
    {
      var date = new Date();
      date.setTime(date.getTime()+(days*24*60*60*1000));
      var expires = "; expires="+date.toGMTString();
    }
    else var expires = "";
    document.cookie = name+"="+value+expires+"; path=/";
}

function readCookie(name) {
    var nameEQ = name + "=";
    var ca = document.cookie.split(';');
    for(var i=0;i < ca.length;i++) {
       var c = ca[i];
       while (c.charAt(0)==' ') c = c.substring(1,c.length);
       if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
    }
    return null;
}

var newuser = readCookie('newuser');

if (newuser == '1') {
    [do something with x]
}

else {
 createCookie('newuser','1',365);
}

Answer 1

这里还有另一个 jQuery cookies 插件:http://code.google.com/p/cookies/