Add minutes and hours to string moment js-CodePudding

input - 15:30
output - 17:10
I try to do this:

time = '15:30'
moment(time)
  .add(40, 'minutes')
  .add(2, 'hours')
  .format('HH:mm')

but it doesn't work, moment says "invalid date"

CodePudding user response：

First of all you need to convert the string date to a valid date, for example:

const time = '15:30'
const date = moment(time, "HH:mm").toDate();

- Read more about format date

Then, you can use the date variable like this:

moment(date)
  .add(40, 'minutes')
  .add(2, 'hours')
  .format('HH:mm')

And finally you will get your date time parsed.

Here is a working version of this:

const time = '15:30'
const date = moment(time, "HH:mm").toDate();

const parsedDate = moment(date)
  .add(40, 'minutes')
  .add(2, 'hours')
  .format('HH:mm')

console.log(parsedDate);

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.29.4/moment.min.js"></script>

CodePudding user response：

Adding 2 hours and 30 minutes to 15:30h will get you 18:10h - also without using moments.js:

const time=new Date(2022,1,1,15,30); // define initial datetime object
time.setHours(time.getHours() 2);
time.setMinutes(time.getMinutes() 40);
console.log(time.toTimeString().slice(0,5));