How can i get cookie value in laravel

I am setting cookie in in blade file using javascript by below piece of code

function showPosition(position) {
    var lat=position.coords.latitude;
    var lng=position.coords.longitude;
    document.cookie="lat=" + lat;
    document.cookie="lng=" + lng;
    //var allcookies = document.cookie;
    //alert(allcookies);
    localStorage.setItem('latLng',latLng);
}

and in model i try to get cookie

$lat = Cookie::get('lat');
$lng = Cookie::get('lng');
dd($lat);

but it shows me null. Any help please.