HookCookie

(function() {
    'use strict';
    var cookie_cache = document.cookie;
    Object.defineProperty(document, 'cookie', {
        get: function() {
            console.log(cookie_cache);
            return cookie_cache;
        },
        set: function(val) {
            debugger;
            var cookie = val.split(";")[0];
            var ncookie = cookie.split("=");
            var flag = false;
            var cache = cookie_cache.split(";");
            cache = cache.map(function(a){
                if (a.split("=")[0] === ncookie[0]){
                    flag = true;
                    return cookie;
                }
                return a;
            })
            cookie_cache = cache.join(";");
            if (!flag){
                cookie_cache += cookie + ";";
            }
        },
    });

})();