Add days to date using javascript

Question

I am trying to add days to a given date using javascript. I have the following code

function onChange(e) {
    var datepicker = $(\"#DatePicker\").val();
           


        

Answer 1

try this.

Date.prototype.addDay = function(numberOfDaysToAdd){
    this.setTime(this.getTime() + (numberOfDaysToAdd * 86400000));
};

function onChange(e) {
        var date = new Date(Date.parse($("#DatePicker").val()));
        date.addDay(1);
        var dd = date.getDate();
        var mm = date.getMonth() + 1;
        var y =  date.getFullYear();
        var joinFormattedDate = dd + '/' + mm + '/' + y;
        $('.new').val(joinFormattedDate);
    }