Question

162

Adding minutes to datetime in momentjs

rated 0 times [ 166] [ 4] / answers: 1 / hits: 127177 / 7 Years ago, fri, february 3, 2017, 12:00:00

I need to add the variable secondsToMinutes to the startdate.

secondsToMinutes is 3:20
startDate = 2:00 PM
endDate should equal 2:03:20 PM.
I've tried a number of ways and get errors each and every time.

   var startdate = data.StartTime;

   startdate = moment(startdate).format('LTS');



   var secondsToMinutes = readableDuration(self.runlength());//='3:20';



   var seconds = secondsToMinutes.split(':')[1];

   var minutes = secondsToMinutes.split(':')[0];



   var date = moment(startdate)

        .add(seconds, 'seconds')

        .add(minutes, 'minutes')

        .format('LTS');

Date shows up as invalid date.

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shaynelandenb

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3 Years ago

answered 7 Years ago jackie · Accepted Answer

moment().format(LTS) returns a string value in hh:mm:ss AM/PM format.
When you create a moment object using a string that is not in standard format, you should pass the input format as second parameter to moment constructor.

For eg: Jan 1, 2017 in string 01012017 is not a standard representation. But if you need a moment object out of it, using moment(01012017) will give Invalid Date response when formatting. Instead, use moment(01012017,DDMMYYYY)

var d = moment(01012017)

d.toISOString() => Invalid date



var d = moment(01012017, DDMMYYYY)

d.toISOString() => 2016-12-31T18:30:00.000Z

In your code, when creating 'date' variable pass hh:mm:ss A as second parameter in the moment constructor as mentioned below .

   var date = moment(startdate, hh:mm:ss A)

        .add(seconds, 'seconds')

        .add(minutes, 'minutes')

        .format('LTS');