timediff

Calculate a time difference in several time units.

Usage

Node

$ npm install --save timediff

var timediff = require('timediff');
 
timediff('2015-01-01', '2018-05-02 02:15:10.777', 'YDHms');
// => { years: 3, days: 121, hours: 2, minutes: 15, milliseconds: 10777 }

Bower

  bower install --save timediff

  <code id="result"></code>
  <script src="bower_components/moment/moment.js"></script> 
  <script src="bower_components/timediff/timediff.js"></script> 
  <script>
    (function showResult () {
      var result = timediff('2015-01-01', '2018-05-02 02:15:10.777', 'YDHms');
      console.log(result);
      document.getElementById('result').innerHTML = JSON.stringify(result);
    })();
  </script> 

CLI

$ npm install --global timediff

$ timediff --help
 
   Usage: timediff <start> <end> [<units>]
 
   Example:
 
     timediff 2013-12-01 '2015-04-20 12:20:10.342' YMWDHmSs
     years: 1
     months: 4
     weeks: 2
     days: 5
     hours: 12
     minutes: 20
     seconds: 10
     milliseconds: 342
 
     timediff 1989-11-09 now YD
     years: 25
     days: 71

Examples

// return the timediff in all possible units
timediff(new Date(2015, 1, 1), new Date('2018-05-02 02:15:10'));
// => { years: 3, months: 3, weeks: 0, days: 1, hours: 2, minutes: 15, seconds: 10, milliseconds: 0 }
 
// return the timediff only in years, weeks, days hours and seconds
timediff(new Date(2015, 1, 1), new Date('2018-05-02 02:15:10.777'), 'YWDHS');
// => { years: 3, weeks: 12, days: 6, hours: 2, seconds: 910 }
 
// return the timediff only in month, minutes seconds, and milliseconds
timediff(new Date(2015, 1, 1), new Date('2018-05-02 02:15:10.777'), 'MmSs');
// => { months: 39, minutes: 1575, seconds: 10, milliseconds: 777 }
 
// provide the result to a callback and return the result of the callback
timediff('1969-06-09T06:09:06.069Z', new Date(), function (result) {
  var strings = [];
  for(var key in result) {
    strings.push(result[key] + ' ' + key);
  }
  return 'age: ' + strings.join(', ');
});
// => 'age: 45 years, 7 months, 0 weeks, 6 days, 5 hours, 54 minutes, 5 seconds, 257 milliseconds'
 
// combine all options
var christmas = new Date(); christmas.setMonth(11); christmas.setDate(24);
timediff(new Date(), christmas, {
  units: 'MWD',
  returnZeros: false,
  callback: function (result) {return 'Time until christmas: ' + JSON.stringify(result);}
});
// => 'Time until christmas: {"months":11,"weeks":1,"days":1}'

API

timediff(start, end, options)

Return the time difference between start and end. Use only the units specified in options.

Return:

{
  years: 0,
  months: 0,
  weeks: 0,
  days: 0,
  hours: 0,
  minutes: 0,
  seconds: 0,
  milliseconds: 0
}

start, end

Required Type: string | Date | moment

options

Type: object | string | function

Default:

{
  units: {
    years:true,
    months: true,
    weeks: true,
    days: true,
    hours: true,
    minutes: true,
    seconds: true,
    milliseconds: true
  },
  returnZeros: true,
  callback: null
}

Use timediff(start, end, unitString) (where unitString is a string) as a shortcut for timediff(start, end, {units: unitString}).

Use timediff(start, end, callback) (where callback is a function) as a shortcut for timediff(start, end, {callback: callback}).

options.units

Type: object | string

Can be an object as given above or a string containing any of YMWDHmSs. If a letter exists in the string the corresponding unit is used in the result.

letter	result uses
Y	years
M	months
W	weeks
D	days
H	hours
m	minutes
S	seconds
s	milliseconds

options.returnZeros

Type: boolean

If true result can contain fields that are 0, if false they are removed.

options.callback

Type: function

Function that is called with the result of timediff as the first parameter. timediff returns the return value of this callback.

Licence

MIT copyright [Marco Taubmann]