Restrict number of days that can be chosen for the date range

bta-custom-range.js

function customRange(input) {
    jQuery(input).addClass('openDatepicker');
    
    var min = new Date(), // Minimum date is today
        dateMin = min,
        dateMax = null,
        dayRange = 7; // Set this to the range of days you want to restrict to

    if (input.id === "booking-start") {
        if ($("#booking-finish").datepicker("getDate") != null) {
            dateMax = $("#booking-finish").datepicker("getDate");
            dateMin = $("#booking-finish").datepicker("getDate");
            dateMin.setDate(dateMin.getDate() - dayRange);
            if (dateMin < min) {
                dateMin = min;
            }
        } else {
            dateMax = new Date(dateMin.getFullYear() + 1, dateMin.getMonth(), dateMin.getDate());
        }                      
    } else if (input.id === "booking-finish") {
        dateMax = new Date(dateMin.getFullYear() + 1, dateMin.getMonth(), dateMin.getDate()); //Set this to your absolute maximum date
        if ($("#booking-start").datepicker("getDate") != null) {
            dateMin = $("#booking-start").datepicker("getDate");
            var rangeMax = new Date(dateMin.getFullYear(), dateMin.getMonth(), dateMin.getDate() + dayRange);
            if (rangeMax < dateMax) {
                dateMax = rangeMax; 
            }
        }
    }
    
    return {minDate: dateMin, maxDate: dateMax};     
}

$('.datepicker').datepicker({
    minDate:0, 
    dateFormat: 'dd-mm-yy',
    beforeShow: customRange,
    onClose: function (dateText, inst) {
        jQuery(inst.input).removeClass('openDatepicker');
    }
});