Difference between two time using dayjs

Question

I have two inputs of time and I want to get the difference/time-interval between these two using dayjs

fromtime = '13:00'
totime = '17:00'

So the output for the above two should be 4:00 hours

I tried

console.log(
          dayjs(fromtime).diff(dayjs(totime), "hours")
        );

But am not getting the expected output.

Answer 1

I found the solution to this.

const fromtime = '11:20'
const totime = '12:30'

const ft = dayjs(`2000-01-01 ${fromtime}`);
const tt = dayjs(`2000-01-01 ${totime}`);
const mins = tt.diff(ft, "minutes", true);
const totalHours = parseInt(mins / 60);
const totalMins = dayjs().minute(mins).$m

This will give the output as totalHours = 1 and totalMins = 10.
Hope this help someone.