Find duration of time period using javascript.

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i need to subtract datetimepicker value form current date, separately.

start date is my picker id.

What I have tried:

JavaScript

function getdate() {
        

        var tt = document.getElementById('Startdate').val();
        alert(tt);

        var today = new Date();
        var dd = today.getDate();
        var mm = today.getMonth() + 1;
        var yyyy = today.getFullYear();
        tod = mm + '/' + dd + '/' + yyyy;
      
        
      
    }

JavaScript

Posted 26-Oct-16 0:44am

T_Sub

Updated 26-Oct-16 1:35am

OriginalGriff

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Nathan Minier · Answer 1 · 2016-10-26T01:35:00

Solution 1

So, the JS Date object is basically just the number of milliseconds from the Unix epoch. You can directly get this using dateObject.getTime().

Therefore, for subtracting a datepicker date from the current date:

JavaScript

var tt = document.getElementById('Startdate').val();
var diff = Date.now() - new Date(tt).getTime();
var seconds = diff/1000;
var minutes = diff/60000;
var hours = diff/3600000;
var days = diff/86400000;

MDN is a good resource for JavaScript documentation:
Date - JavaScript | MDN[^]

Posted 26-Oct-16 1:35am

Nathan Minier

Updated 26-Oct-16 1:45am

v2

Comments

T_Sub 26-Oct-16 7:43am

thanks but got error ,tt.getTime is not a function

Nathan Minier 26-Oct-16 7:46am

Allright, updated. I sort of assumed you or your framework was already converting the tt variable from the datepicker. My bad.

Afzaal Ahmad Zeeshan 27-Oct-16 7:21am

5ed.

T_Sub · Answer 2 · 2016-10-26T23:38:00

HI All, Thanks for your helps, i have solved this. [Get duration as days, calculations between Current date and date you selected]

JavaScript

<script type="text/javascript">
    $(document).ready(function () {
      

        $("#enddate").datepicker({
            changeMonth: true,
            changeYear: true,
            firstDay: 1,
            dateFormat: 'dd/mm/yy',
        }).datepicker("setDate", "0");

        $("#Startdate").datepicker({
            changeMonth: true,
            changeYear: true,
            firstDay: 1,
            dateFormat: 'dd/mm/yy',
        })

        $("#Startdate").datepicker({ dateFormat: 'dd-mm-yy' });
        $("#enddate").datepicker({ dateFormat: 'dd-mm-yy' });

        $('#notificationstatus').on('change', function () {

            if ($(this).val() == 10) {
                var start = $('#Startdate').datepicker('getDate');
                var end = $('#enddate').datepicker('getDate');

                if (start < end) {
                    var days = (end - start) / 1000 / 60 / 60 / 24;
                    $('#days').text(days);
                }
                else {
                    $('#days').text("Time Mismatched !");
                }
            }
            else if ($(this).val() == 20) {
                var start = $('#Startdate').datepicker('getDate');
                var end = $('#enddate').datepicker('getDate');

                if (start < end) {
                    var days = (end - start) / 1000 / 60 / 60 / 24;
                    $('#days').text(days);
                }
                else {
                    $('#days').text("Time Mismatched !");
                }

            }
        });
    });

Thank You !!!