题解 | #倒计时#

function second(second) {
     let day = Math.floor(second/(60*60*24));
    let hour = Math.floor(second%(60*60*24)/(60*60));
    let min = Math.floor(second%(60*60)/60);
    let sec =second%60;
    return {day:day,
           hour:hour,
           min:min,
           second:sec}

}
function render(data) {
    let time = document.getElementsByTagName("span");

     if(data.day==0){
         time[0].classList.add('hide');
     }

    data.day<10?(time[0].innerHTML=`0${data.day}天`):(time[0].innerHTML=`${data.day}天`);
    data.hour<10?time[1].innerHTML=`0${data.hour}:`:time[1].innerHTML=`${data.hour}:`;
    data.min<10?time[2].innerHTML=`0${data.min}:`:time[2].innerHTML=`${data.min}:`;
    data.second<10?time[3].innerHTML=`0${data.second}`:time[3].innerHTML=`${data.second}`;

}