Get the next upcoming Friday at 5 PM - momentjs

Question

I need to display how far away a deadline is that is every Friday at 5PM. Moment will give me that date for a day of the week, but it's always the current time, so the deadline always displays 'x days, 23 hours, 59 minutes'. How do I get the day, AND a specific time from moment? In my example, I need deadline to be 'next Friday, at 17:00' instead of 'next Friday, at the current time'
console.log(timeLeft());
function timeLeft() {
var dayINeed = 5; // for Friday
var deadline;
// if we haven't yet passed the day of the week that I need:
if (moment().isoWeekday() <= dayINeed) {
// then just give me this week's instance of that day
deadline = moment().isoWeekday(dayINeed);
} else {
// otherwise, give me next week's instance of that day
deadline = moment().add(1, 'weeks').isoWeekday(dayINeed);
}
console.log(deadline);
const now = moment();
const days = deadline.diff(now, 'days');
const hours = deadline.subtract(days, 'days').diff(now, 'hours');
const minutes = deadline.subtract(hours, 'hours').diff(now, 'minutes');
return `${days} days, ${hours} hours, and ${minutes} minutes`;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.20.1/moment.js"></script>

Answer 1

You have to set to deadline the time (17:00), instead of getting current time, you can use moment startOf() and set(), simply add the following to your code:
deadline.startOf('day').set({h: 17});
This way you are setting 17:00:00 to deadline and you will get the desired output.
Here a full example:
console.log(timeLeft());
function timeLeft() {
var dayINeed = 5; // for Friday
var deadline;
// if we haven't yet passed the day of the week that I need:
if (moment().isoWeekday() <= dayINeed) {
// then just give me this week's instance of that day
deadline = moment().isoWeekday(dayINeed);
} else {
// otherwise, give me next week's instance of that day
deadline = moment().add(1, 'weeks').isoWeekday(dayINeed);
}
deadline.startOf('day').set({h: 17});
console.log(deadline.format());
const now = moment();
const days = deadline.diff(now, 'days');
const hours = deadline.subtract(days, 'days').diff(now, 'hours');
const minutes = deadline.subtract(hours, 'hours').diff(now, 'minutes');
return `${days} days, ${hours} hours, and ${minutes} minutes`;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.20.1/moment.js"></script>
If you want, you can use setter like hour(), minute() etc to set 17:00:00 to deadline.