将以秒为单位的时间间隔转换为更易于阅读的形式

 function secondsToString(seconds)
{
var numyears = Math.floor(seconds / 31536000);
var numdays = Math.floor((seconds % 31536000) / 86400);
var numhours = Math.floor(((seconds % 31536000) % 86400) / 3600);
var numminutes = Math.floor((((seconds % 31536000) % 86400) % 3600) / 60);
var numseconds = (((seconds % 31536000) % 86400) % 3600) % 60;
return numyears + " years " +  numdays + " days " + numhours + " hours " + numminutes + " minutes " + numseconds + " seconds";


}

Try following:

seconds = ~~(milliseconds / 1000);
minutes = ~~(seconds / 60);
hours = ~~(minutes / 60);
days = ~~(hours / 24);
weeks = ~~(days / 7);
year = ~~(days / 365);

Note:

• A usual year has 365 days. A leap year has 366 days, so you need additional check if this is an issue for you.
• The similar problem with daylight saving. Some days have 23 and some 25 hours when time's changed.

Conclusion: this is a rude but small and simple snippet :)

With help of Royi we've got code that outputs time interval in a human readable form:

function millisecondsToStr (milliseconds) {
// TIP: to find current time in milliseconds, use:
// var  current_time_milliseconds = new Date().getTime();


function numberEnding (number) {
return (number > 1) ? 's' : '';
}


var temp = Math.floor(milliseconds / 1000);
var years = Math.floor(temp / 31536000);
if (years) {
return years + ' year' + numberEnding(years);
}
//TODO: Months! Maybe weeks?
var days = Math.floor((temp %= 31536000) / 86400);
if (days) {
return days + ' day' + numberEnding(days);
}
var hours = Math.floor((temp %= 86400) / 3600);
if (hours) {
return hours + ' hour' + numberEnding(hours);
}
var minutes = Math.floor((temp %= 3600) / 60);
if (minutes) {
return minutes + ' minute' + numberEnding(minutes);
}
var seconds = temp % 60;
if (seconds) {
return seconds + ' second' + numberEnding(seconds);
}
return 'less than a second'; //'just now' //or other string you like;
}

function millisecondsToString(milliseconds) {
var oneHour = 3600000;
var oneMinute = 60000;
var oneSecond = 1000;
var seconds = 0;
var minutes = 0;
var hours = 0;
var result;


if (milliseconds >= oneHour) {
hours = Math.floor(milliseconds / oneHour);
}


milliseconds = hours > 0 ? (milliseconds - hours * oneHour) : milliseconds;


if (milliseconds >= oneMinute) {
minutes = Math.floor(milliseconds / oneMinute);
}


milliseconds = minutes > 0 ? (milliseconds - minutes * oneMinute) : milliseconds;


if (milliseconds >= oneSecond) {
seconds = Math.floor(milliseconds / oneSecond);
}


milliseconds = seconds > 0 ? (milliseconds - seconds * oneSecond) : milliseconds;


if (hours > 0) {
result = (hours > 9 ? hours : "0" + hours) + ":";
} else {
result = "00:";
}


if (minutes > 0) {
result += (minutes > 9 ? minutes : "0" + minutes) + ":";
} else {
result += "00:";
}


if (seconds > 0) {
result += (seconds > 9 ? seconds : "0" + seconds) + ":";
} else {
result += "00:";
}


if (milliseconds > 0) {
result += (milliseconds > 9 ? milliseconds : "0" + milliseconds);
} else {
result += "00";
}


return result;
}

This function outputs seconds in this format : 11h 22m, 1y 244d, 42m 4s etc Set the max variable to show as many identifiers as you want.

function secondsToString (seconds) {


var years = Math.floor(seconds / 31536000);
var max =2;
var current = 0;
var str = "";
if (years && current<max) {
str+= years + 'y ';
current++;
}
var days = Math.floor((seconds %= 31536000) / 86400);
if (days && current<max) {
str+= days + 'd ';
current++;
}
var hours = Math.floor((seconds %= 86400) / 3600);
if (hours && current<max) {
str+= hours + 'h ';
current++;
}
var minutes = Math.floor((seconds %= 3600) / 60);
if (minutes && current<max) {
str+= minutes + 'm ';
current++;
}
var seconds = seconds % 60;
if (seconds && current<max) {
str+= seconds + 's ';
current++;
}


return str;
}

This is a solution. Later you can split by ":" and take the values of the array

 /**
* Converts milliseconds to human readeable language separated by ":"
* Example: 190980000 --> 2:05:3 --> 2days 5hours 3min
*/
function dhm(t){
var cd = 24 * 60 * 60 * 1000,
ch = 60 * 60 * 1000,
d = Math.floor(t / cd),
h = '0' + Math.floor( (t - d * cd) / ch),
m = '0' + Math.round( (t - d * cd - h * ch) / 60000);
return [d, h.substr(-2), m.substr(-2)].join(':');
}


//Example
var delay = 190980000;
var fullTime = dhm(delay);
console.log(fullTime);

millisToTime = function(ms){


x = ms / 1000;
seconds = Math.round(x % 60);
x /= 60;
minutes = Math.round(x % 60);
x /= 60;
hours = Math.round(x % 24);
x /= 24;
days = Math.round(x);


return {"Days" : days, "Hours" : hours, "Minutes" : minutes, "Seconds" : seconds};
}

This will take milliseconds as an int, and give you an JSON object containing all the info you could need

To show only what you need and not day 0, hours 0...

formatTime = function(time) {
var ret = time % 1000 + ' ms';
time = Math.floor(time / 1000);
if (time !== 0) {
ret = time % 60 + "s "+ret;
time = Math.floor(time / 60);
if (time !== 0) {
ret = time % 60 + "min "+ret;
time = Math.floor(time / 60);
if (time !== 0) {
ret = time % 60 + "h "+ret;
...
}
}
}
return ret;
};

I'm a big fan of objects, so I created this from https://metacpan.org/pod/Time::Seconds

Usage:

var human_readable = new TimeSeconds(986543).pretty(); // 11 days, 10 hours, 2 minutes, 23 seconds


;(function(w) {
var interval = {
second: 1,
minute: 60,
hour: 3600,
day: 86400,
week: 604800,
month: 2629744, // year / 12
year: 31556930 // 365.24225 days
};


var TimeSeconds = function(seconds) { this.val = seconds; };


TimeSeconds.prototype.seconds = function() { return parseInt(this.val); };
TimeSeconds.prototype.minutes = function() { return parseInt(this.val / interval.minute); };
TimeSeconds.prototype.hours = function() { return parseInt(this.val / interval.hour); };
TimeSeconds.prototype.days = function() { return parseInt(this.val / interval.day); };
TimeSeconds.prototype.weeks = function() { return parseInt(this.val / interval.week); };
TimeSeconds.prototype.months = function() { return parseInt(this.val / interval.month); };
TimeSeconds.prototype.years = function() { return parseInt(this.val / interval.year); };


TimeSeconds.prototype.pretty = function(chunks) {
var val = this.val;
var str = [];


if(!chunks) chunks = ['day', 'hour', 'minute', 'second'];


while(chunks.length) {
var i = chunks.shift();
var x = parseInt(val / interval[i]);
if(!x && chunks.length) continue;
val -= interval[i] * x;
str.push(x + ' ' + (x == 1 ? i : i + 's'));
}


return str.join(', ').replace(/^-/, 'minus ');
};


w.TimeSeconds = TimeSeconds;
})(window);

If you are interested in an existing javascript library that does the job very well, you may want to check moment.js.

More specifically, the relevant moment.js piece for your question is durations.

Here are some examples of how you can take advantage of it to achieve your task:

var duration = moment.duration(31536000);


// Using the built-in humanize function:
console.log(duration.humanize());   // Output: "9 hours"
console.log(duration.humanize(true));   // Output: "in 9 hours"

moment.js has built-in support for 50+ human languages, so if you use the humanize() method you get multi-language support for free.

If you want to display the exact time information, you can take advantage of the moment-precise-range plug-in for moment.js that was created exactly for this purpose:

console.log(moment.preciseDiff(0, 39240754000);
// Output: 1 year 2 months 30 days 5 hours 12 minutes 34 seconds

One thing to note is that currently moment.js does not support weeks / days (in week) for duration object.

Hope this helps!

I cleaned up one of the other answers a bit provides nice '10 seconds ago' style strings:

function msago (ms) {
function suffix (number) { return ((number > 1) ? 's' : '') + ' ago'; }
var temp = ms / 1000;
var years = Math.floor(temp / 31536000);
if (years) return years + ' year' + suffix(years);
var days = Math.floor((temp %= 31536000) / 86400);
if (days) return days + ' day' + suffix(days);
var hours = Math.floor((temp %= 86400) / 3600);
if (hours) return hours + ' hour' + suffix(hours);
var minutes = Math.floor((temp %= 3600) / 60);
if (minutes) return minutes + ' minute' + suffix(minutes);
var seconds = Math.floor(temp % 60);
if (seconds) return seconds + ' second' + suffix(seconds);
return 'less then a second ago';
};

Way more simple and readable.

milliseconds = 12345678;
mydate=new Date(milliseconds);
humandate=mydate.getUTCHours()+" hours, "+mydate.getUTCMinutes()+" minutes and "+mydate.getUTCSeconds()+" second(s)";

Which gives:

"3 hours, 25 minutes and 45 second(s)"

With the help of Dan answer, I came up with this if you want to calculate the difference between the post created time (from DB it should be retrieved as UTC) and the users system time and then show them the elapsed time, you could use below function

function dateToStr(input_date) {
input_date= input_date+" UTC";
// convert times in milliseconds
var input_time_in_ms = new Date(input_date).getTime();
var current_time_in_ms = new Date().getTime();
var elapsed_time = current_time_in_ms - input_time_in_ms;


function numberEnding (number) {
return (number > 1) ? 's' : '';
}


var temp = Math.floor(elapsed_time / 1000);
var years = Math.floor(temp / 31536000);
if (years) {
return years + ' year' + numberEnding(years);
}
//TODO: Months! Maybe weeks?
var days = Math.floor((temp %= 31536000) / 86400);
if (days) {
return days + ' day' + numberEnding(days);
}
var hours = Math.floor((temp %= 86400) / 3600);
if (hours) {
return hours + ' hour' + numberEnding(hours);
}
var minutes = Math.floor((temp %= 3600) / 60);
if (minutes) {
return minutes + ' minute' + numberEnding(minutes);
}
var seconds = temp % 60;
if (seconds) {
return seconds + ' second' + numberEnding(seconds);
}
return 'less than a second'; //'just now' //or other string you like;
}

eg: usage

var str = dateToStr('2014-10-05 15:22:16');

Took a swing based on @Royi's response:

/**
* Translates seconds into human readable format of seconds, minutes, hours, days, and years
*
* @param  {number} seconds The number of seconds to be processed
* @return {string}         The phrase describing the amount of time
*/
function forHumans ( seconds ) {
var levels = [
[Math.floor(seconds / 31536000), 'years'],
[Math.floor((seconds % 31536000) / 86400), 'days'],
[Math.floor(((seconds % 31536000) % 86400) / 3600), 'hours'],
[Math.floor((((seconds % 31536000) % 86400) % 3600) / 60), 'minutes'],
[(((seconds % 31536000) % 86400) % 3600) % 60, 'seconds'],
];
var returntext = '';


for (var i = 0, max = levels.length; i < max; i++) {
if ( levels[i][0] === 0 ) continue;
returntext += ' ' + levels[i][0] + ' ' + (levels[i][0] === 1 ? levels[i][1].substr(0, levels[i][1].length-1): levels[i][1]);
};
return returntext.trim();
}

Nice thing about mine is that there is no repetitive ifs, and won't give you 0 years 0 days 30 minutes 1 second for example.

For example:

forHumans(60) outputs 1 minute

forHumans(3600) outputs 1 hour

and forHumans(13559879) outputs 156 days 22 hours 37 minutes 59 seconds

To Convert time in millisecond to human readable format.

 function timeConversion(millisec) {


var seconds = (millisec / 1000).toFixed(1);


var minutes = (millisec / (1000 * 60)).toFixed(1);


var hours = (millisec / (1000 * 60 * 60)).toFixed(1);


var days = (millisec / (1000 * 60 * 60 * 24)).toFixed(1);


if (seconds < 60) {
return seconds + " Sec";
} else if (minutes < 60) {
return minutes + " Min";
} else if (hours < 24) {
return hours + " Hrs";
} else {
return days + " Days"
}
}

Following a similar approach to @Dan, I have modified @Royi Namir's code to output a string with commas and and's:

secondsToString = function(seconds) {
var numdays, numhours, nummilli, numminutes, numseconds, numyears, res;
numyears = Math.floor(seconds / 31536000);
numdays = Math.floor(seconds % 31536000 / 86400);
numhours = Math.floor(seconds % 31536000 % 86400 / 3600);
numminutes = Math.floor(seconds % 31536000 % 86400 % 3600 / 60);
numseconds = seconds % 31536000 % 86400 % 3600 % 60;
nummilli = seconds % 1.0;
res = [];
if (numyears > 0) {
res.push(numyears + " years");
}
if (numdays > 0) {
res.push(numdays + " days");
}
if (numhours > 0) {
res.push(numhours + " hours");
}
if (numminutes > 0) {
res.push(numminutes + " minutes");
}
if (numseconds > 0) {
res.push(numseconds + " seconds");
}
if (nummilli > 0) {
res.push(nummilli + " milliseconds");
}
return [res.slice(0, -1).join(", "), res.slice(-1)[0]].join(res.length > 1 ? " and " : "");
};

It has no period so one can add sentences after it, like here:

perform: function(msg, custom, conn) {
var remTimeLoop;
remTimeLoop = function(time) {
if (time !== +custom[0]) {
msg.reply((secondsToString(time)) + " remaining!");
}
if (time > 15) {
return setTimeout((function() {
return remTimeLoop(time / 2);
}), time / 2);
}
};
// ...
remTimeLoop(+custom[0]);
}

Where custom[0] is the total time to wait for; it will keep dividing the time by 2, warning the time remaining until the timer ends, and stop warning once the time is under 15 seconds.

function secondsToTimeString(input) {
let years = 0, days = 0, hours = 0, minutes = 0, seconds = 0;
let ref = [31536000,86400,3600,60,1];
for (let i = 0;i < ref.length;i++) {
let val = ref[i];
while (val <= input) {
input -= val;
if (i === 0) years++;
if (i === 1) days++;
if (i === 2) hours++;
if (i === 3) minutes++;
if (i === 4) seconds++;
}
return {years, days, hours, minutes, seconds};
}

Thanks to @Dan / @ Royi for the logic. However the implementation doesn't build time string like XX days, XX mins. I adjusted their code a bit:

function millisecondsToStr( milliseconds ) {
let temp = milliseconds / 1000;
const years = Math.floor( temp / 31536000 ),
days = Math.floor( ( temp %= 31536000 ) / 86400 ),
hours = Math.floor( ( temp %= 86400 ) / 3600 ),
minutes = Math.floor( ( temp %= 3600 ) / 60 ),
seconds = temp % 60;


if ( days || hours || seconds || minutes ) {
return ( years ? years + "y " : "" ) +
( days ? days + "d " : "" ) +
( hours ? hours + "h " : ""  ) +
( minutes ? minutes + "m " : "" ) +
Number.parseFloat( seconds ).toFixed( 2 ) + "s";
}


return "< 1s";
}

When one runs it

console.log("=", millisecondsToStr( 1540545689739 - 1540545684368 ));
console.log("=", millisecondsToStr( 351338536000 ));

The results look like:

= 5.37s
= 11y 51d 10h 2m 16.00s

There is the Intl.RelativeTimeFormat API, which is supported in recent versions of Chrome and Firefox.

An few examples:

let rtf = new Intl.RelativeTimeFormat("en");
rtf.format(-1, "day"); // 'yesterday'
rtf.format(-2, 'day'); // '2 days ago'
rtf.format(13.37, 'second'); // 'in 13.37 seconds'

And there's a lot more in this blog post and in the proposal itself.

function java_seconds_to_readable(seconds)
{
var numhours = Math.floor(seconds / 3600);
var numminutes = Math.floor((seconds / 60) % 60);
var numseconds = seconds % 60;
return numhours + ":" + numminutes + ":" + numseconds;
}

More simple way. You can years and days respectively.

Here is my take.

Feel free to play around with it in the jsbin.

// This returns a string representation for a time interval given in milliseconds
// that appeals to human intuition and so does not care for leap-years,
// month length irregularities and other pesky nuisances.
const human_millis = function (ms, digits=1) {
const levels=[
["ms", 1000],
["sec", 60],
["min", 60],
["hrs", 24],
["days", 7],
["weeks", (30/7)], // Months are intuitively around 30 days
["months", 12.1666666666666666], // Compensate for bakari-da in last step
["years", 10],
["decades", 10],
["centuries", 10],
["millenia", 10],
];
var value=ms;
var name="";
var step=1;
for(var i=0, max=levels.length;i<max;++i){
value/=step;
name=levels[i][0];
step=levels[i][1];
if(value < step){
break;
}
}
return value.toFixed(digits)+" "+name;
}


console.clear();
console.log("---------");
console.log(human_millis(1));
console.log(human_millis(10));
console.log(human_millis(100));
console.log(human_millis(1000));
console.log(human_millis(1000*60));
console.log(human_millis(1000*60*60));
console.log(human_millis(1000*60*60*24));
console.log(human_millis(1000*60*60*24*7));
console.log(human_millis(1000*60*60*24*30));
console.log(human_millis(1000*60*60*24*365));
console.log(human_millis(1000*60*60*24*365*10));
console.log(human_millis(1000*60*60*24*365*10*10));
console.log(human_millis(1000*60*60*24*365*10*10*10));
console.log(human_millis(1000*60*60*24*365*10*10*10*10));

If you use Typescript type and cast to make it work

let name : string | number = "";
let step : string | number =1;
for(var i=0, max=levels.length;i<max;++i){
value/= step as number;
name=levels[i][0];
step=levels[i][1];
if(value < step){
break;
}
        

}

Output:

"---------"
"1.0 ms"
"10.0 ms"
"100.0 ms"
"1.0 sec"
"1.0 min"
"1.0 hrs"
"1.0 days"
"1.0 weeks"
"1.0 months"
"1.0 years"
"1.0 decades"
"1.0 centuries"
"1.0 millenia"
"10.0 millenia"

Adding to the myriad of methods, here's a cheap and short way to retrieve a human readable time with only a single time unit.

const timeScalars = [1000, 60, 60, 24, 7, 52];
const timeUnits = ['ms', 'secs', 'mins', 'hrs', 'days', 'weeks', 'years'];


const getHumanReadableTime = (ms, dp = 0) => {
let timeScalarIndex = 0, scaledTime = ms;


while (scaledTime > timeScalars[timeScalarIndex]) {
scaledTime /= timeScalars[timeScalarIndex++];
}


return `${scaledTime.toFixed(dp)} ${timeUnits[timeScalarIndex]}`;
};

Example outputs:

getHumanReadableTime(512000);
getHumanReadableTime(5120000);
getHumanReadableTime(51200000);
getHumanReadableTime(51200000, 2);
getHumanReadableTime(51200000, 6);


/*


Output:
'9 min'
'1 hrs'
'14 hrs'
'14.22 hrs'
'14.222222 hrs'


*/

Below will work for both past and future datetime, also have option to pass locale.

function relativeTime(isoString, locale = "en") {
const timestamp = Date.parse(isoString);
const msPerMinute = 60 * 1000;
const msPerHour = msPerMinute * 60;
const msPerDay = msPerHour * 24;
const msPerMonth = msPerDay * 30;
const msPerYear = msPerDay * 365;


const current = Date.now();
let elapsed = current - timestamp;


const sign = elapsed > 0 ? -1 : 1;


elapsed = Math.abs(elapsed);


const rtf = new Intl.RelativeTimeFormat(locale, { numeric: "auto" });


if (elapsed < msPerMinute) {
return rtf.format(sign * Math.floor(elapsed / 1000), "seconds");
} else if (elapsed < msPerHour) {
return rtf.format(sign * Math.floor(elapsed / msPerMinute), "minutes");
} else if (elapsed < msPerDay) {
return rtf.format(sign * Math.floor(elapsed / msPerHour), "hours");
} else if (elapsed < msPerMonth) {
return rtf.format(sign * Math.floor(elapsed / msPerDay), "days");
} else if (elapsed < msPerYear) {
return rtf.format(sign * Math.floor(elapsed / msPerMonth), "months");
} else {
return new Date(timestamp).toLocaleString(locale);
}
}

Output:

relativeTime(new Date().toISOString()) //'2021-11-13T18:48:58.243Z'
-> now


relativeTime('2021-11-13T18:48:50.243Z')
-> 8 seconds ago


relativeTime('2021-11-14T18:48:50.243Z')
-> in 23 hours


relativeTime('2021-11-15T18:48:50.243Z')
-> tomorrow


relativeTime('2021-10-15T18:48:50.243Z')
-> 29 days ago


relativeTime('2021-12-15T18:48:50.243Z')
-> next month

if you use node :

const humanize = require('human-date');


let yesterday = new Date(new Date().setDate(new Date().getDate()-1));


console.log(humanize.relativeTime(yesterday)); //=> 1 day ago