<div> 停留時間:<input type="text"> </div>
<script>
let inpu_ = document.querySelector("input")
function double(mat) {
return 10 > mat ? "0" + mat : mat;
}
let date = 0;
let hour = 0;
let minute = 0;
let second = 0;
setInterval(function () {
second++;
if (second === 60) {
minute += 1;
second = 0;
}
if (minute === 60) {
hour += 1;
minute = 0;
}
if (hour === 24) {
date += 1;
hour = 0;
}
days = double(date) + "天:" + double(hour) + ":" + double(minute) + ":" + double(second);
inpu_.value = days;
}, 1000)
</script>