  "backwards-out",
        "in":   "backwards-in"
      }
    };
    var outClass = "on-top";
    var activeClass = "active";
    var importDoc = document.currentScript.ownerDocument;
    var template = importDoc.querySelector('#template-web-slide');
    
    slideProto.createdCallback   = slideProtoCreatedCallback;
    slideProto.attachedCallback  = slideProtoAttachedCallback;
    slideProto.showSlide         = showSlide;
    slideProto.hideSlide         = hideSlide;
    slideProto.nextFragment      = next