CODEWITHSUNDEEP
javascriptmomentjs
Ovy MC
Ovy MC

Reputation: 89

How to get hours difference between now and next friday

I want to get hours difference between now and next friday 18:00 (weekend) using momentjs, I tried this but it doesn't work :

public getWeekend() {
    const nextFriday = moment().weekday(4)
    nextFriday.hours(18) // Weekend time: 18:00
    nextFriday.minutes(0)
    nextFriday.seconds(0)

    const diff = moment(nextFriday.diff(moment()))
    console.log(diff.days())
    if (diff.days() * 24 + diff.hours() <= 99) {
      return nextFriday.toString()
    } else {
      return 0
    }
  }
}

console.log(diff.days()) is printing 6 days whereas we are Wednesday

Upvotes: 1

Views: 108

Answers (6)

Paresh Barad
Paresh Barad

Reputation: 1609

You can take hours difference using (now - next Friday) / 60*60*1000 method, Try it:

const nextFriday = moment().day(5)
var hours = Math.abs(new Date() - nextFriday) / 36e5; 
console.log(hours);

Note: 36e5 is the scientific notation for 60*60*1000

Upvotes: 0

Artem Arkhipov
Artem Arkhipov

Reputation: 7455

UPDATED , it is totally correct now.

First of all Friday actually has sequence number 5, so use it instead 4. const nextFriday = moment().weekday(5) - this is correct Friday.

Next important thing is that nearest Friday is taken by default, it means that already passed Friday can be selected (for example if it is Satturday today). In such case we just need to add one week.

Here is working code snippet:

function getWeekend() {
    const today = moment();
    const friday = moment().weekday(5);
    // check if wee need to add one week in case of previous Friday selected
    if (friday < today) { 
        friday.add(1, 'weeks');
    }
    friday.hours(18) // Weekend time: 18:00
    friday.minutes(0)
    friday.seconds(0)
    return friday.diff(moment(), 'hours');
}

const hoursToFriday = getWeekend();
console.log(`Friday 18:00 will be in ${hoursToFriday} hours`);
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.js"></script>

Upvotes: 0

jeroen mulder
jeroen mulder

Reputation: 11

Moment.js has a build in function .fromNow() it returns the time beween the given time and the local time. So the only 2 line you need to change are the .weekday(4) because friday is weekday(5). and call the .fromnow() function.

console.log(getWeekend());
function getWeekend() {
    const nextFriday = moment().weekday(5);
    nextFriday.hours(18); // Weekend time: 18:00
    nextFriday.minutes(0);
    nextFriday.seconds(0);
    return nextFriday.fromNow();
}
<script src="https://momentjs.com/downloads/moment.min.js"></script>

Note that fromNow will return a string Moment.js has a build in solution for this.

Upvotes: 0

Ghoul Ahmed
Ghoul Ahmed

Reputation: 4806

try this:

function getWeekend() {

    const nextFriday = moment().weekday(4)
        nextFriday.hours(18) // Weekend time: 18:00
        nextFriday.minutes(0)
        nextFriday.seconds(0)

        const diffHours = moment.duration(nextFriday.diff(moment())).asHours()
        console.log(`${diffHours} hours`) // 31.7 hours
        if (diffHours <= 99) {
          return nextFriday.toString()
        } else {
          return 0
        }
      }

Upvotes: 1

TKoL
TKoL

Reputation: 13892

https://jsfiddle.net/7ehoq06n/

If you just call moment().weekday(5) it will go to Friday of "this week", which means that if you're on a saturday, it will go to YESTERDAY.

If you want the next friday, always in the future, use this:

var today = moment();
var friday = moment().weekday(5);
if (friday < today) {
    friday.add(1, 'weeks');
}

Upvotes: 0

Idan
Idan

Reputation: 4023

I recommended to use moment 

const diff = moment.duration(nextFriday.diff(moment()))
const deepDiff = diff.format("D [day], H [hour and] m [min]")

Upvotes: 1

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