how to send ajax response in laravel controller code example

Example: laravel ajax post data to controller

$.ajax({
            url: "/route/to",
            type: 'POST',
            beforeSend: function (request) {
                return request.setRequestHeader('X-CSRF-Token', $("meta[name='csrf-token']").attr('content'));
            },
            success: data => {
                console.log(data);
            }
        });