Read and store cookies

//存储   
function __setCookie(key, value, day) {
    var date = new Date();
    date.setTime(date.getTime() + (Number(day) || 730)*24*60*60*1000);
    document.cookie = key + '=' + value + ';expires=' + date.toGMTString() + ';path=/';
}

//读取cookie 
'getCookie': function (cname) {
        let name = cname + "=";
        let ca = document.cookie.split(';');
        for(let i=0; i<ca.length; i++) {
            let c = ca[i].trim();
            if (c.indexOf(name)==0) return c.substring(name.length,c.length);
        }
        return "";
    },