How to convert minutes to hours/minutes and add various time values together using jQuery?

Question

There are a couple parts to this question. I am not opposed to using a jQuery plugin if anyone knows of one that will accomplish what I want done.

Q1 - How do I convert minutes into hours and vise versa? For example how would I convert 90 minutes into 1 hour and 30 minutes. In the code below how would I get "totalMin" converted and displayed in "convertedHour" and "convertedMin"?

HTML:

<span class="totalMin">90</span> Minutes  <span class="convertedHour">0</span> Hours <span class="convertedMin">0</span> Minutes 

jsFiddle: http://jsfiddle.net/ExFBD

Q2 - How would I add up a group of time slots? For example, How would I add 1 hour 30 mins, 2 hours 45 mins and 2 hour 15 mins together?

HTML:

<span class="hour-1 hour">1</span> hour <span class="min-1 min">30</span> min  <span class="hour-2 hour">2</span> hour <span class="min-2 min">45</span> min  <span class="hour-3 hour">2</span> hour <span class="min-3 min">15</span> min   <span class="totalHour">0</span> hour <span class="totalMin">0</span> min 

jsFiddle: http://jsfiddle.net/DX9YA/

Q3 - How would I take a time value (3 hours and 30 mins) and add it to a real time stamp such as 10:30 AM? How would I take AM vs PM into account?

Answer 1

Q1:

$(document).ready(function() {     var totalMinutes = $('.totalMin').html();      var hours = Math.floor(totalMinutes / 60);               var minutes = totalMinutes % 60;      $('.convertedHour').html(hours);     $('.convertedMin').html(minutes);     }); 

Q2:

$(document).ready(function() {      var minutes = 0;      $('.min').each(function() {         minutes = parseInt($(this).html()) + minutes;     });      var realmin = minutes % 60     var hours = Math.floor(minutes / 60)      $('.hour').each(function() {         hours = parseInt($(this).html()) + hours;     });       $('.totalHour').html(hours);     $('.totalMin').html(realmin);      }); 

Answer 2

In case you want to return a string in 00:00 format...

convertMinsToHrsMins: function (minutes) {   var h = Math.floor(minutes / 60);   var m = minutes % 60;   h = h < 10 ? '0' + h : h;    m = m < 10 ? '0' + m : m;    return h + ':' + m; } 

Thanks for the up-votes. Here's a slightly tidier ES6 version :)

const convertMinsToHrsMins = (mins) => {   let h = Math.floor(mins / 60);   let m = mins % 60;   h = h < 10 ? '0' + h : h; // (or alternatively) h = String(h).padStart(2, '0')   m = m < 10 ? '0' + m : m; // (or alternatively) m = String(m).padStart(2, '0')   return `${h}:${m}`; }