题解 | #模板字符串#

  // 字节外派笔试题有类似题目
  var person = {
                level: '2',
                name: '小丽',
                registTime: '2021-11-01',
            }
            var h2 = document.querySelector('h2');
            // 补全代码
            let endTime=new Date(person.registTime).getTime()
            let newTime=new Date().getTime()
            let day=Math.floor((newTime-endTime)/86400000)
            let str=`尊贵的牛客网${person.level}级用户${person.name}您好,您已经注册牛客网${day}天啦~`
            h2.innerHTML=str