题解 | JS82 倒计时

function second(second) {
    let mins = parseInt(second/60);
    let hours = parseInt(mins/60);
    let days = parseInt(hours/24);
    return {
        day: days,
        hour: hours%24,
        min: mins%60,
        second: second%60
    }
}

function render(data) {
    let cur = document.querySelector('#jsCountdown');
    let content = `
        <span class="${data.day>0?data.day:'hide'}">${("0"+data.day).slice(-2)}天</span>
        <span>${("0"+data.hour).slice(-2)}:</span>
        <span>${("0"+data.min).slice(-2)}:</span>
        <span>${("0"+data.second).slice(-2)}</span>
    `
    cur.innerHTML = content;
}