flatpicker set check in date < check out date

flatpicker.js

// booking date  check in > check out

$( document ).ready(function() {
    var check_in = flatpickr(".in-date",{dateFormat: "d/m/Y",});
    var check_out = flatpickr(".out-date",{dateFormat: "d/m/Y",});
    
    check_in.element.addEventListener("change", function(){
        
        check_out.set( "minDate" , check_in.element.value );
    });
    
    check_out.element.addEventListener("change", function(){
        check_in.set( "maxDate" , check_out.element.value );
    });
    
});