Get the days, hours and minutes in Moment.js

Question

So This is my first time using Moment.js and I encountered the following problem, so I have this following dates:

now: 2017-01-26T14:21:22+0000 expiration: 2017-01-29T17:24:22+0000 

What I want to get is:

Day: 3 Hours: 3 Mins: 3 

I tried the following code:

const now = moment(); const exp = moment(expire_date); console.log(expire_date); days = exp.diff(now, 'days'); hours = exp.diff(now, 'hours') - (days * 24); minutes = exp.diff(now, 'minutes') - ((days * 1440) + (hours * 24) * 60); 

I know I did something wrong (maybe my calculation or I used the wrong method), but I can't figure out what it is.

Answer 1

MomentJS can calculate all that for you without you doing any logic.

• First find the difference between the two moments
• Express it as a Duration
• Then display whichever component .days(), .hours() of the duration that you want.

Note: You can also express the entire duration .asDays(), .asHours() etc if you want.

const now = moment("2017-01-26T14:21:22+0000");  const expiration = moment("2017-01-29T17:24:22+0000");    // get the difference between the moments  const diff = expiration.diff(now);    //express as a duration  const diffDuration = moment.duration(diff);    // display  console.log("Days:", diffDuration.days());  console.log("Hours:", diffDuration.hours());  console.log("Minutes:", diffDuration.minutes());

<script src="https://momentjs.com/downloads/moment.js"></script>

Answer 2

this will give you the right values and remove the headache of manual calculations

let expiration = "2017-01-29T17:24:22+0000"  const now = moment();  const exp = moment(expiration);    console.log(exp.format());    days = exp.diff(now, 'days');  hours = exp.subtract(days, 'days').diff(now, 'hours');  minutes = exp.subtract(hours, 'hours').diff(now, 'minutes');    console.log(days, hours, minutes)

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.17.1/moment.min.js"></script>

note that the substract operations will mutate the original exp value, so don't go passing it around expecting it to be the original date