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());

已经有很多答案了，但我的要求是:

转换为持续时间(即，应适用于大于24小时的值) 关心的小数秒到给定的十进制精度 如果为零，则截断前面的小时和分钟。

const seconds2duration = ( seconds, decimals=0 ) => { let fraction = ( seconds - Math.floor( seconds ) ).toFixed( decimals ); fraction = decimals === 0 ? '' : fraction.slice( 1 ); const [ hours, mins, secs ] = [ seconds / 3600, seconds % 3600 / 60, seconds % 3600 % 60 ].map( ( x ) => String( Math.floor( x ) ).padStart( 2, '0' ) ); if ( hours === '00' && mins === '00' ) { return secs + fraction; } else if ( hours === '00' ) { return [ mins, secs + fraction ].join( ':' ); } else { return [ hours, mins, secs + fraction ].join( ':' ); } }; console.log(seconds2duration(25*3600 + 0*60 + 41 + 0.333, 0)); // 25:00:41 console.log(seconds2duration(0*3600 + 5*60 + 41 + 0.333, 0)); // 05:41 console.log(seconds2duration(0*3600 + 5*60 + 41 + 0.333, 1)); // 05:41.3 console.log(seconds2duration(0*3600 + 0*60 + 41 + 0.333, 2)); // 41.33

当我想象一个时钟或计时器时，我会这样做:

const secondsTo_HHMMSS = (seconds) => {
      //format to a readable friendly timer
      let hour = Math.floor(seconds / 3600);
      let minute = Math.floor((seconds % 3600) / 60);
      let second = seconds % 60;

      if(hour.toString().length === 1) {
            hour = `0${hour}`;
      }
      if(minute.toString().length === 1) {
            minute = `0${minute}`;
      }
      if(second.toString().length === 1) {
            second = `0${second}`;
      };

      let timer = `${hour}-${minute}-${second}`;

      return timer;
}

var sec_to_hms = function(sec){
var min, hours;
     sec = sec - (min = Math.floor(sec/60))*60;
     min = min - (hours = Math.floor(min/60))*60;
     return (hours?hours+':':'') + ((min+'').padStart(2, '0')) + ':'+ ((sec+'').padStart(2, '0'));
}
alert(sec_to_hms(2442542));

下面是一个函数，根据powtac的答案将秒转换为hh-mm-ss格式

斯菲德尔

/** 
 * Convert seconds to hh-mm-ss format.
 * @param {number} totalSeconds - the total seconds to convert to hh- mm-ss
**/
var SecondsTohhmmss = function(totalSeconds) {
  var hours   = Math.floor(totalSeconds / 3600);
  var minutes = Math.floor((totalSeconds - (hours * 3600)) / 60);
  var seconds = totalSeconds - (hours * 3600) - (minutes * 60);

  // round seconds
  seconds = Math.round(seconds * 100) / 100

  var result = (hours < 10 ? "0" + hours : hours);
      result += "-" + (minutes < 10 ? "0" + minutes : minutes);
      result += "-" + (seconds  < 10 ? "0" + seconds : seconds);
  return result;
}

示例使用

var seconds = SecondsTohhmmss(70);
console.log(seconds);
// logs 00-01-10

对于任何使用AngularJS的人来说，一个简单的解决方案是使用date API来过滤值，它会根据请求的格式将毫秒转换为字符串。例子:

<div>Offer ends in {{ timeRemaining | date: 'HH:mm:ss' }}</div>

请注意，这需要毫秒，所以如果从秒转换(就像最初的问题一样)，可能需要将timerremain乘以1000。