moment to add days code example
Example 1: moment add 30 days
moment().add(30, 'days');
Example 2: moment js add day
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');
moment().add(30, 'days');
var new_date = moment(startdate, "DD-MM-YYYY").add(5, 'days');