example4.js

<div id="reportrange" style="background: #fff; cursor: pointer; padding: 5px 10px; border: 1px solid #ccc; width: 100%">
    <i class="fa fa-calendar"></i>&nbsp;
    <span></span> <i class="fa fa-caret-down"></i>
</div>

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

    var start = moment().subtract(29, 'days');
    var end = moment();

    function cb(start, end) {
        $('#reportrange span').html(start.format('MMMM D, YYYY') + ' - ' + end.format('MMMM D, YYYY'));
    }

    $('#reportrange').daterangepicker({
        startDate: start,
        endDate: end,
        ranges: {
           'Today': [moment(), moment()],
           'Yesterday': [moment().subtract(1, 'days'), moment().subtract(1, 'days')],
           'Last 7 Days': [moment().subtract(6, 'days'), moment()],
           'Last 30 Days': [moment().subtract(29, 'days'), moment()],
           'This Month': [moment().startOf('month'), moment().endOf('month')],
           'Last Month': [moment().subtract(1, 'month').startOf('month'), moment().subtract(1, 'month').endOf('month')]
        }
    }, cb);

    cb(start, end);

});
</script>

I have two input field with id "id_start_date" and "id_end_date" . how can i pass the values to this fields in this format "2019-04-24"?

<div id="div_id_start_date" class="form-group">
    <label for="id_start_date" class="col-form-label ">
        Start date
    </label>
    <div class="">
        <input type="text" name="start_date" value="2019-04-24" class="datetimeinput form-control" id="id_start_date"> </div>
</div>
<div id="div_id_end_date" class="form-group">
    <label for="id_end_date" class="col-form-label ">
        End date
    </label>
    <div class="">
        <input type="text" name="end_date" value="2019-05-02" class="datetimeinput form-control" id="id_end_date"> </div>
</div>

<input type="submit" id="btnsubmit" value="Submit">

function cb(start, end) {
    $('#id_start_date').val(start.format('YYYY-MM-DD'));
    $('#id_end_date').val(end.format('YYYY-MM-DD'));
}

is there a way to do an altFormat like the flatpickr?

altFormat | String | "F j, Y" | Exactly the same as date format, but for the altInput field
altInput | Boolean | false | Show the user a readable date (as per altFormat), but return something totally different to the server.

No