题解 | JS11 模板字符串

        const registDate = new Date(person.registTime);
        const registMilTime = registDate.valueOf();
        const nowMilTime = new Date().valueOf();
        const days = Math.floor((nowMilTime - registMilTime) / (1000 * 60 * 60* 24));
        const str = `尊贵的牛客网${person.level}级用户${person.name}您好，您已经注册牛客网${days}天啦~`
        document.getElementsByTagName('h2')[0].innerText = str;