Javascript(JS)对Cookie的读取、删除、写入操作帮助方法

 var CookieUtils = {
     get: function (name) {
         var cookieName = encodeURIComponent(name) + '=',
             cookieStart = document.cookie.indexOf(cookieName),
             cookieValue = null;
         if (cookieStart > -1) {
             var cookieEnd = document.cookie.indexOf(';', cookieStart);
             if (cookieEnd == -1) {
                 cookieEnd = document.cookie.length;
             }
             cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));
         }
         return cookieValue;
     },
     set: function (name, value, expires, path, domain, secure) {
         var cookieText = encodeURIComponent(name) + "=" + encodeURIComponent(value);
         if (expires instanceof Date) {
             cookieText += "; expried=" + expires.toGMTString();
         }
         if (path) {
             cookieText += "; path=" + path;
         }
         if (domain) {
             cookieText += "; domain=" + domain;
         }
         if (secure) {
             cookieText += "; secure";
         }
         document.cookie = cookieText;
     },
     unset: function (name, path, domain, secure) {
         this.set(name, "", new Date(0), path, domain, secure);
     }
 }

这样即可以调用CookieUtils.get/set/unset方法进行Cookie操作。

项目完成后会对本方法进行进一步完善。

参考自《Javascript高级程序设计》