
#######
isError
#######

.. js:function:: Sc.isError

   .. rst-class:: sig-pretty-signature
   
      | isError(**x**\ : *unknown*\ ): x *is* :js:data:`OpaqueError <Sc.OpaqueError>`
   
   **Parameters**
   
      **x**\ : *unknown*
   
   
   **Returns**\ : x *is* :js:data:`OpaqueError <Sc.OpaqueError>`
   




