如何在 JavaScript 中向 HH:MM:SS 添加分钟数？

Question

我想将分钟（整数类型）添加到 HH:MM:SS（字符串类型）。

示例：

let min = 125;
let time = "10:00:00";

结果 = "12:05:00"

Answer 1

首先你必须解析文本，然后创建一个日期对象，然后加上 125 分钟（以毫秒为单位）最后但并非最不重要的是你可以格式化创建的日期：

let min = 125;
let [hh, mm, ss] = "10:00:00".split(':').map(s=>parseInt(s, 10));

const d = new Date();
d.setHours(hh);
d.setMinutes(mm);
d.setSeconds(ss);
const result = new Date(d.getTime() + 125 * 60 * 1000);
console.info(result); // result is the date with the correct time
    
// formatting the output:
const dateTimeFormat = new Intl.DateTimeFormat('de', {
    year: 'numeric',
    month: '2-digit',
    day: '2-digit',
    hour: '2-digit',
    minute: '2-digit',
    second: '2-digit',
});

const [,,,,,,{value:hour},,{value: minute},,{value: second}] = dateTimeFormat.formatToParts(result);
console.info(`${hour}:${minute}:${second}`);

--> 12:05:00

我认为此 post 中的所有其他答案（没有日期对象）都不正确。

您可以使用 moment.js 进行双重检查：

let now = new Date();
var date = moment(new Date(), "hh:mm:ss");
console.info(date.format('LTS')); // -> 7:50:37 AM

date = date.add(262080 , 'minutes');
console.info(date.format('LTS')); // -> 6:50:37 AM

参见：codepen

Answer 2

你可以试试这个

let min = 125;

let time = "10:00:00";

console.log(addtime(time,min));

function addtime(time,hour){
  let times=time.split(":");
  //clear here more than 24 hours
  min=min%(24*60);
  times[0]=(parseInt(times[0]))+parseInt(min/60) ;
  times[1]=parseInt(times[1])+min%60;
  //here control if hour and minutes reach max
  if(times[1]>=60) { times[1]=0 ;times[0]++} ;
  times[0]>=24 ?  times[0]-=24  :null;
  
  //here control if less than 10 then put 0 frond them
  times[0]<10 ? times[0]= "0" + times[0] : null ;
  times[1]<10 ? times[1]= "0" + times[1] : null ;
  
  return times.join(":");
}

Answer 3

这是一个快速函数，可以将 添加分钟 到时间字符串 HH:MM:SS。不影响秒，只是操纵分钟和小时。可以改进，但只是一个快速的解决方案。下面有几个测试示例。

 function timeAddMinutes(time, min) {
var t = time.split(":"),      // convert to array [hh, mm, ss]
    h = Number(t[0]),         // get hours
    m = Number(t[1]);         // get minutes
m+= min % 60;                 // increment minutes
h+= Math.floor(min/60);       // increment hours
if (m >= 60) { h++; m-=60 }   // if resulting minues > 60 then increment hours and balance as minutes

return (h+"").padStart(2,"0")  +":"  //create string padded with zeros for HH and MM
       +(m+"").padStart(2,"0") +":"
       +t[2];                        // original seconds unchanged
}  

// ======= example tests =============
console.log(timeAddMinutes('10:00:00', 125));        // '12:05:00'
console.log(timeAddMinutes('10:47:00', 4*60+15));    // '15:02:00'
console.log(timeAddMinutes('10:00:00', 0));          // '10:00:00'
console.log(timeAddMinutes('10:00:00', 60+17));      // '11:17:00'
console.log(timeAddMinutes('00:30:00', 30));         // '01:00:00'
console.log(timeAddMinutes('05:45:00', 45));         // '06:30:00'
console.log(timeAddMinutes('10:00:00', 60*100+5));   // '110:05:00'

Answer 4

一种策略是将值转换为通用组件（如秒），添加值，然后将格式设置为 H:mm:ss。通用函数通常比 ad hoc 函数具有更广泛的适用性，因此如果您将分钟作为数字，最好将其重构为调用中的字符串，例如

/** Add times, only deals with positive values
** @param {string} t0 : time in h[:mm[:ss]] format
** @param {string} t1 : time in same format as t0
** @returns {string} summ of t0 and t1 in h:mm:ss format
**/
function addTimes(t0, t1) {
  return secsToTime(timeToSecs(t0) + timeToSecs(t1));
}

// Convert time in H[:mm[:ss]] format to seconds
function timeToSecs(time) {
  let [h, m, s] = time.split(':');
  return h*3600 + (m|0)*60 + (s|0)*1;
}

// Convert seconds to time in H:mm:ss format
function secsToTime(seconds) {
  let z = n => (n<10? '0' : '') + n; 
  return (seconds / 3600 | 0) + ':' +
       z((seconds % 3600) / 60 | 0) + ':' +
        z(seconds % 60);
}

let min = 125;
let time = "10:00:00";

console.log(addTimes('0:'+ min, time));

// or

console.log(addTimes(secsToTime(min * 60), time));

上面的 addTimes 函数不处理负值。如果你想这样做，处理标志还有一些工作，特别是输出：

/** Add times
** @param {string} t0 : time in [-]h[:mm[:ss]] format
** @param {string} t1 : time in same format as t0
** @returns {string} summ of t0 and t1 in h:mm:ss format
**/
function addTimes(t0, t1) {
  return secsToTime(timeToSecs(t0) + timeToSecs(t1));
}

// Convert time in H[:mm[:ss]] format to seconds
function timeToSecs(time) {
  let sign = /^-/.test(time);
  let [h, m, s] = time.match(/\d+/g);
  return (sign? -1 : 1) * (h*3600 + (m|0)*60 + (s|0)*1);
}

// Convert seconds to time in H:mm:ss format
function secsToTime(seconds) {
  let sign = seconds < 0? '-':'';
  seconds = Math.abs(seconds);
  let z = n => (n<10?'0':'') + n;
  return sign +
         (seconds / 3600 | 0) + ':' +
       z((seconds%3600) / 60 | 0) + ':' +
        z(seconds%60);
}

let min  = -125;
let time = "10:00:00";

// Convert min to a timestamp in the call
console.log(addTimes(secsToTime(min * 60), time));

注意ECMAScript中没有整数类型，只有number。

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