用JavaScript写一个运行时间统计

直接上代码。

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/* filename:run_time.js */

function time_calc(Y, M, D, h, m, s) {
var seconds = 1000;
var minutes = seconds * 60;
var hours = minutes * 60;
var days = hours * 24;
var years = days * 365;

var today = new Date();
var time = Date.UTC(today.getFullYear(), today.getMonth() + 1, today.getDate(), today.getHours(), today.getMinutes(), today.getSeconds()) - Date.UTC(Y, M, D, h, m, s);
var year = Math.floor(time / years)
var day = Math.floor((time / days) - year * 365);
var hour = Math.floor((time - (year * 365 + day) * days) / hours);
var minute = Math.floor((time - (year * 365 + day) * days - hour * hours) / minutes);
var second = Math.floor((time - (year * 365 + day) * days - hour * hours - minute * minutes) / seconds);

return { "year": year, "day": day, "hour": hour, "minute": minute, "second": second };
}

function site_run_time(Y,M,D,h,m,s)
{
window.setInterval(function() {
var time = time_calc(Y,M,D,h,m,s);

document.getElementById('time_year').innerText = time.year;
document.getElementById('time_day').innerText = time.day;
document.getElementById('time_hour').innerText = time.hour;
document.getElementById('time_minute').innerText = time.minute;
document.getElementById('time_second').innerText = time.second;
}, 1000);
}

HTML部分:

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<!-- filename:index.html -->

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Demo</title>
</head>
<body>
<div id="footer">
<p>系统已稳定运行:
<span id="time_year"></span>
<span id="time_day"></span>
<span id="time_hour"></span>
<span id="time_minute"></span>
<span id="time_second"></span>
</p>
</div>
<script src="run_time.js"></script>
<script>
site_run_time(2021,1,1,0,0,0);
</script>
</body>
</html>

解析

主要利用window.setInterval(func_name,time)来实现反复执行。时间计算利用UNIX时间戳完成。

这里说一下UNIX时间戳:它表示自1970.1.1 00:00:00开始,过了多少毫秒

作者

xeonds

发布于

2021-10-27

更新于

2024-10-08

许可协议

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