大佬们指点一下倒计时有什么问题吗?

20 阅读1分钟

看了另外一张帖子,关于倒计时组件的,就自己写了一个,大家帮忙看下,写得怎么样?有什么问题,可以指出来!

<div class="time"></div>
function countdown(time) {
    let lastTime = Date.now();
    let rafId;
    function refresh() {
        const curTime = Date.now();
        const more = curTime - lastTime - 1000;
        if (more > 0) {
            lastTime = curTime + more;
            const nextTime = time--;
            if (nextTime === 0) {
                cancelAnimationFrame(rafId);
                return;
            }
            update(time);
        }
        rafId = requestAnimationFrame(refresh);
    }

    function update(restTime) {
        const h = restTime > 3600 ? Math.floor(restTime / 60) : 0;
        const m = Math.floor((restTime - h * 3600) / 60);
        const s = restTime - h * 3600 - m * 60;
        const dom = document.querySelector('.time');
        dom.innerHTML = `剩余${h}小时${m}分钟${s}秒`;
    }
    refresh();
    update(time);
}
countdown(1000);