JavaScript - difference between two time strings [duplicate]

Question

I need to compare two different datetime strings (formed: YYYY-MM-DD'T'HH:mm).

Here are the datetime strings:

var a = ("2017-05-02T10:45");
var b = ("2017-05-02T12:15");

I've sliced the dates out of them so I only need the time (formed: HH:mm).

var now = a.slice(11, 16);
var then = b.slice(11, 16);

// now = 10:45
// then = 12:15

Is there any way I could get the difference between these two times?

Result should look like this:

1 hour 30 minutes

Also if the dates are different is there any easy solution to get the date difference too?

Answer 1

Use javascript Date:

var a = ("2017-05-02T10:45");
var b = ("2017-05-02T12:15");
var milliseconds = ((new Date(a)) - (new Date(b)));

var minutes = milliseconds / (60000);