js cookie 操作 封装

pCookie.js

(function(){

    var PotatogCookie = {};

    //设置cookie
    PotatogCookie.set = function(key, value, delay)
    {
        //默认cookie为七天之后过期 3s 4m 5h 7d 秒 分 时 天
        if(delay == "undefined")delay = "7d";
        delay = delay.toLowerCase();

        var expireDate = new Date();

        var num = parseInt(delay);
        if(delay.indexOf("d") !== -1)
        {
            expireDate.setDate(expireDate.getDate() + num);
        }
        else if(delay.indexOf("h") !== -1)
        {
            expireDate.setHours(expireDate.getHours() + num);
        }
        else if(delay.indexOf("m") !== -1)
        {
            expireDate.setMinutes(expireDate.getMinutes() + num);
        }
        else if(delay.indexOf("s") !== -1)
        {
            expireDate.setSeconds(expireDate.getSeconds() + num);
        }
        else
        {
            expireDate.setDate(expireDate.getDate() + num);
        }
        if(typeof value == "object")
        {
            value = JSON.stringify(value);
        }
        value = escape(value);
        document.cookie = key + "=" + value + ";expires=" + expireDate.toGMTString();
        return this.get(key);
    }

    //得到cookie 如果不存在 返回 undefined
    PotatogCookie.get = function(key)
    {
        var objCookie = {};
        var cookie = document.cookie;
        var keyValueList = cookie.split(";");
        for(var index in keyValueList)
        {
            var keyValue = keyValueList[index].split("=");
            var k = keyValue[0].trim();
            var v = keyValue[1];
　　　　　　　　　v = unescape(v);
            v = this.decodeJson(v);
            objCookie[k] = v;
        }

        if(typeof key == "undefined")
        {
            return objCookie;
        }

        return objCookie[key];
    }
    //删除cookie
    PotatogCookie.del = function(key)
    {
        //删除所有cookie
        if(typeof key == "undefined")
        {
            var cookieList = this.get();
            for(key in cookieList)
            {
                this.del(key);
            }
            return true;
        }
        else
        {
            if(this.get(key) == "undefined")
            {
                return false;
            }
            else
            {
                return this.set(key,'',"0s");
            }
        }
    }
    PotatogCookie.decodeJson = function(value)
    {
        //数组转成的对象字符串
        var regAryStr = /^\[[\s|\S]*\]$/;
        //对象转成的对象字符串
        var regObjStr = /^\{([\"\s|\S]+\"\:\"[\s|\S]*)+\"\}$/;
        if(regAryStr.test(value))
        {
            return eval("(" + value + ")");
        }
        if(regObjStr.test(value))
        {
            return JSON.parse(value);
        }
        return value;
    }
    window.pCookie = PotatogCookie;
})(window);

demo.html

使用方式

设置cookie

pCookie.set("name","张三","7d");

读取cookie 如果不存在 返回undefined

var name = pCookie.get("name");不传参表示获得所有

删除cookie

pCookie.del("name");不传参表示删除所有