vue3定时器

<template>
 <p>剩余时间:{{ count }}</p>
</template>
export default{
const seconds = ref(1800);//定义一下秒数，根据秒数来计算，需要自己判断
const countDown = () => {
      let d = parseInt(seconds.value / (24 * 60 * 60));
      d = d < 10 ? "0" + d : d;
      let h = parseInt((seconds.value / (60 * 60)) % 24);
      h = h < 10 ? "0" + h : h;
      let m = parseInt((seconds.value / 60) % 60);
      m = m < 10 ? "0" + m : m;
      let s = parseInt(seconds.value % 60);
      s = s < 10 ? "0" + s : s;
      count.value = m + "分" + s + "秒";
      // console.log('监听',count.value );
    };
//
const timed = () => {
      dsq.value = setInterval(() => {
        seconds.value -= 1;
        countDown();
      }, 1000);
    };
}