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<head>
<meta charset="UTF-8" />
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<title>Document</title>
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<body></body>
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<script>
function countTime(st) {
const date = new Date(st); // 指定时间
date.setDate(date.getDate() + 1); // 将日期增加一天
var date1 = new Date(); //开始时间
var date2 = date; //结束时间
var date3 = date2.getTime() - date1.getTime(); //时间差的毫秒数
//计算出相差天数
var days = Math.floor(date3 / (24 * 3600 * 1000));
//计算时差
var hours = Math.floor(date3 % (24 * 3600 * 1000) / (3600 * 1000));
//计算分差
var minutes = Math.floor(date3 % (24 * 3600 * 1000) % (3600 * 1000) / (60 * 1000));
//计算秒差
var seconds = Math.round( date3 % (24 * 3600 * 1000) % (3600 * 1000) % (60 * 1000) / 1000);
return `${days}天${hours}时${minutes}分${seconds}秒`;
}
document.write(countTime("2023-10-08 16:05:06"));
</script>
标签：24,10,date3,3600,08,js,var,Math,1000 From： https://www.cnblogs.com/iuniko/p/17749858.html