How to calculate difference between two dates in terms of hours

Webix JS
#1

Is it possible to get difference between two dates in terms of hours for e.g.
if dateA is Tue Jul 17 2018 00:00:00 GMT-0400 (Eastern Daylight Time) and dateB is Fri Jul 27 2018 23:59:00 GMT-0400 (Eastern Daylight Time) the hour difference would be 240 i.e. 10 days

I am using the following format of datepicker

                        view:"datepicker",
                        id: "start",
                        name: "start_date",
                        label: 'Start:',
                        invalid:true,
                        timepicker: true,
                        placeholder: "dd/mm/yy hh:mm:ss",
                        editable: true,
                        format:"%Y-%m-%d %H:%i:%s",
                        type:"calendar"

Similarly I have another for end_date and I would like to calculate the difference between selections in terms of hours but it seems like I am not able to find anything in the docs that could help me get a hold of only the date part of the or only the time or something that could help me break down the whole date object into pieces that I can use to compute this hour difference. Can someone please point me in the right direction

#2

Actually, the difference will be 264 hours ( 10days * 24hour + 23 hours 59 minutes of time difference )

Webix doesn’t provide any special functionality for such a task.
You can use common JS code for date diff calculation.

https://snippet.webix.com/7sokmzat