这里没有一个答案满足我的要求，因为我想能够处理

大量的秒(天)，以及 负数

尽管OP不要求这些，但是覆盖边缘情况是一个很好的实践，特别是当它不需要花费太多精力时。

很明显，当他说秒的时候，OP的意思是秒的数量。为什么要把函数固定在字符串上?

function secondsToTimeSpan(seconds) {
    const value = Math.abs(seconds);
    const days = Math.floor(value / 1440);
    const hours = Math.floor((value - (days * 1440)) / 3600);
    const min = Math.floor((value - (days * 1440) - (hours * 3600)) / 60);
    const sec = value - (days * 1440) - (hours * 3600) - (min * 60);
    return `${seconds < 0 ? '-':''}${days > 0 ? days + '.':''}${hours < 10 ? '0' + hours:hours}:${min < 10 ? '0' + min:min}:${sec < 10 ? '0' + sec:sec}`
}
secondsToTimeSpan(0);       // => 00:00:00
secondsToTimeSpan(1);       // => 00:00:01
secondsToTimeSpan(1440);    // => 1.00:00:00
secondsToTimeSpan(-1440);   // => -1.00:00:00
secondsToTimeSpan(-1);      // => -00:00:01

这招很管用:

function secondstotime(secs)
{
    var t = new Date(1970,0,1);
    t.setSeconds(secs);
    var s = t.toTimeString().substr(0,8);
    if(secs > 86399)
        s = Math.floor((t - Date.parse("1/1/70")) / 3600000) + s.substr(2);
    return s;
}

(来源此处)

对于HH:MM:SS的特殊情况。MS (eq: "00:04:33.637")， FFMPEG用来指定毫秒。

[-] [HH: MM: SS(打烊……) HH表示小时数，MM表示分钟数 最大值为2位，SS为最大值为2的秒数 位数。最后的m表示SS的十进制值。

/* HH:MM:SS.MS to (FLOAT)seconds ---------------*/ function timerToSec(timer){ let vtimer = timer.split(":") let vhours = +vtimer[0] let vminutes = +vtimer[1] let vseconds = parseFloat(vtimer[2]) return vhours * 3600 + vminutes * 60 + vseconds } /* Seconds to (STRING)HH:MM:SS.MS --------------*/ function secToTimer(sec){ let o = new Date(0) let p = new Date(sec*1000) return new Date(p.getTime()-o.getTime()) .toISOString() .split("T")[1] .split("Z")[0] } /* Example: 7hours, 4 minutes, 33 seconds and 637 milliseconds */ const t = "07:04:33.637" console.log( t + " => " + timerToSec(t) + "s" ) /* Test: 25473 seconds and 637 milliseconds */ const s = 25473.637 // "25473.637" console.log( s + "s => " + secToTimer(s) )

示例使用，毫秒传输计时器:

/* Seconds to (STRING)HH:MM:SS.MS --------------*/ function secToTimer(sec){ let o = new Date(0) let p = new Date(sec*1000) return new Date(p.getTime()-o.getTime()) .toISOString() .split("T")[1] .split("Z")[0] } let job, origin = new Date().getTime() const timer = () => { job = requestAnimationFrame(timer) OUT.textContent = secToTimer((new Date().getTime() - origin) / 1000) } requestAnimationFrame(timer) span {font-size:4rem} <span id="OUT"></span> <br> <button onclick="origin = new Date().getTime()">RESET</button> <button onclick="requestAnimationFrame(timer)">RESTART</button> <button onclick="cancelAnimationFrame(job)">STOP</button>

绑定到媒体元素的示例用法

/* Seconds to (STRING)HH:MM:SS.MS --------------*/ function secToTimer(sec){ let o = new Date(0) let p = new Date(sec*1000) return new Date(p.getTime()-o.getTime()) .toISOString() .split("T")[1] .split("Z")[0] } VIDEO.addEventListener("timeupdate", function(e){ OUT.textContent = secToTimer(e.target.currentTime) }, false) span {font-size:4rem} <span id="OUT"></span><br> <video id="VIDEO" width="400" controls autoplay> <source src="https://www.w3schools.com/html/mov_bbb.mp4" type="video/mp4"> </video>

在问题之外，那些用php编写的函数:

<?php 
/* HH:MM:SS to (FLOAT)seconds ------------------*/
function timerToSec($timer){
  $vtimer = explode(":",$timer);
  $vhours = (int)$vtimer[0];
  $vminutes = (int)$vtimer[1];
  $vseconds = (float)$vtimer[2];
  return $vhours * 3600 + $vminutes * 60 + $vseconds;
}
/* Seconds to (STRING)HH:MM:SS -----------------*/
function secToTimer($sec){
  return explode(" ", date("H:i:s", $sec))[0];  
}

var  timeInSec = "661"; //even it can be string

String.prototype.toHHMMSS = function () { 
   /* extend the String by using prototypical inheritance */
    var seconds = parseInt(this, 10); // don't forget the second param
    var hours   = Math.floor(seconds / 3600);
    var minutes = Math.floor((seconds - (hours * 3600)) / 60);
    seconds = seconds - (hours * 3600) - (minutes * 60);

    if (hours   < 10) {hours   = "0"+hours;}
    if (minutes < 10) {minutes = "0"+minutes;}
    if (seconds < 10) {seconds = "0"+seconds;}
    var time    = hours+':'+minutes+':'+seconds;
    return time;
}

alert("5678".toHHMMSS());   // "01:34:38"
console.log(timeInSec.toHHMMSS());   //"00:11:01"

我们可以把这个函数写得更短更清晰，但这会降低可读性，所以我们要把它写得尽可能简单，尽可能稳定。

或者你可以在这里检查一下:

您尝试过向Date对象添加秒数吗?

Date.prototype.addSeconds = function(seconds) {
    this.setSeconds(this.getSeconds() + seconds);
};
var dt = new Date();
dt.addSeconds(1234);

一个示例: https://jsfiddle.net/j5g2p0dc/5/

更新: 样本链接缺失，所以我创建了一个新的。

String.prototype.toHHMMSS = function () {
    var sec_num = parseInt(this, 10); // don't forget the second param
    var hours   = Math.floor(sec_num / 3600);
    var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
    var seconds = sec_num - (hours * 3600) - (minutes * 60);

    if (hours   < 10) {hours   = "0"+hours;}
    if (minutes < 10) {minutes = "0"+minutes;}
    if (seconds < 10) {seconds = "0"+seconds;}
    return hours+':'+minutes+':'+seconds;
}

使用的例子

alert("186".toHHMMSS());