อยากให้ช่วยเรื่องการจองห้องพัก Check in แล้ว Check out จากปฏิทิน

$('#demo').daterangepicker({
    "dateLimit": {
        "days": 7
    },
    "locale": {
        "format": "MM/DD/YYYY",
        "separator": " - ",
        "applyLabel": "Apply",
        "cancelLabel": "Cancel",
        "fromLabel": "From",
        "toLabel": "To",
        "customRangeLabel": "Custom",
        "weekLabel": "W",
        "daysOfWeek": [
            "Su",
            "Mo",
            "Tu",
            "We",
            "Th",
            "Fr",
            "Sa"
        ],
        "monthNames": [
            "January",
            "February",
            "March",
            "April",
            "May",
            "June",
            "July",
            "August",
            "September",
            "October",
            "November",
            "December"
        ],
        "firstDay": 1
    },
    "startDate": "02/16/2018",
    "endDate": "02/22/2018"
}, function(start, end, label) {
  console.log('New date range selected: ' + start.format('YYYY-MM-DD') + ' to ' + end.format('YYYY-MM-DD') + ' (predefined range: ' + label + ')');
});