Delete warning

hey guys i wanna ask how to display a delete warning with sweet alert

here's my blade

 <form id="inbox" action ="{{ action('[email protected]', $inbox->id) }}" method="post">

                    {{csrf_field()}}
                    <input name = "_method" type="hidden" value="DELETE"/>
                    <button id ="delete" type = "submit" class = "btn btn-danger btn-xs" value= "Delete"/>
                      
                    </button>


<script>
 $('button.btn btn-danger btn-xs').on('click', function()
{

  // Display SweetAlert

   swal("Are you sure?", {
  icon: "warning",
  dangerMode: true,
  buttons: true,
}),

 //On clicking 'Yes, I am sure to delete'

 function(){  
      $(this).closest('#inbox').submit();
    }

}
   
</script>

the problem is when i press the delete button the item just deleted right away. thanks for the help