- help_id = "#{id}_help" - checkbox_attributes = local_assigns.slice(:id, :type, :name, :value, :required, :checked) - checkbox_attributes[:type] ||= 'checkbox' .custom-control.custom-checkbox %input.custom-control-input{ **checkbox_attributes } %label.custom-control-label{ for: id, aria: { describedby: help_id } }= content - if (block = yield).present? %small.form-text.text-muted{ id: help_id }= block