Answers for "different to time by moment js"

momentjs date and time string add minutes

moment(date, "DD-MM-YYYY hh:mm:ss")
                        .add(10, 'minutes')
                        .format('DD/MM/YYYY hh:mm:ss');

moment js difference between start and end in hours

var duration = moment.duration(end.diff(startTime));
var hours = duration.asHours();