javascript 原生操作 cookie 工具类

class CookieUtil{
    //获取 cookie 成员方法
    static get(name){
        let cookieName=`${encodeURIComponent(name)}=`,
        cookieStart=document.cookie.indexOf(cookieName),
        cookieValue=null;

        if(cookieStart>-1){
            let cookieEnd=document.cookie.indexOf(";",cookieStart);
            if(cookieEnd==-1){
                cookieEnd=document.cookie.length;
            }
            cookieValue=decodeURIComponent(document.cookie.substring(cookieStart+cookieName.length,cookieEnd));
        }
        return cookieValue;
    }
    //设置cookie 的静态成员方法
    static set(name,value,expires,path,domain,secure){
        let cookieText=`${encodeURIComponent(name)}=${encodeURIComponent(value)}`
        if(expires instanceof Date){
            cookieText+=`; expires=${expires.toGMTString()}`;
        }
        if(path){
            cookieText+=`; path=${path}`;
        }
        if(domain){
            cookieText+=`; domain=${domain}`;
        }
        if(secure){
            cookieText+="; secure";
        }
        document.cookie=cookieText;
    }
    //删除 cookie 的方法
    static unset(name,path,domain,secure){
        CookieUtil.set(name,"",new Date(0),path,domain,secure);
    }
}

//设置cookie

CookieUtil.set("name","Nicholas");

CookieUtil.set("book","Professional JavaScript");

//读取cookie

alert(CookieUtil.get("name"));

alert(CookieUtil.get("book"));

//删除cookie

CookieUtil.unset("name");

CookieUtil.unset("book");

// 设置有路径、域和过期时间的 cookie

CookieUtil.set("name","Nicholas","/books/projs/","www.baidu.com",new Date("January 1, 2022"));

//删除刚设置的cookie

CookieUtil.unset("name","/books/projs/",null,null,null,true);