         guard let url = Bundle.main.url(forResource: fileName,
                                         withExtension: fileType) else { return }
 
-//        guard let cssUrl = Bundle.main.url(forResource: "style",
-//                                           withExtension: "css") else { return }
+        // guard let cssUrl = Bundle.main.url(forResource: "style",
+        //                                  withExtension: "css") else { return }
 
-//        guard let cssUrl2 = Bundle.main.url(forResource: "style",
-//                                                  withExtension: "css",
-//                                                  subdirectory: nil) else { return }
+        // guard let cssUrl2 = Bundle.main.url(forResource: "style",
+        //                                   withExtension: "css",
+        //                                    subdirectory: nil) else { return }
 
         // get url for directory instead of for just one file
         // http://stackoverflow.com/questions/40692737/how-to-get-path-to-a-subfolder-in-main-bundle
         let resourcePath = Bundle.main.resourcePath
         let webResourcesDirUrl = URL(fileURLWithPath:resourcePath!)
             .appendingPathComponent("webResources")
-
+        
         // http://stackoverflow.com/questions/24882834/wkwebview-not-loading-local-files-under-ios-8?rq=1
         webView.loadFileURL(url, allowingReadAccessTo: webResourcesDirUrl)
     }
-
+    
 }
 


        printConstraints()
    }
    
    func printConstraints() {
        print("view.constraints().count \(view.constraints.count)")
        for constraint in view.constraints {


    /**
     Typically app calls userContentController.addUserScript(userScriptBackgroundColor())
     - returns: script to set web page background color. This overrides setting in style.css
     */
    class func userScriptBackgroundColor() -> WKUserScript {
        let paleBlueColor = "\"#CCF\""
        let userScriptSource = "document.body.style.background = \(paleBlueColor);"
        let userScript = WKUserScript(source: userScriptSource,
                                      injectionTime: .atDocumentEnd,
                                      forMainFrameOnly: true)
        return userScript
    }

    /**
     Typically app calls userContentController.addUserScript(userScriptPostMessage())
     - returns: script to call postMessage so web page will send message to app
     */
    class func userScriptPostMessage() -> WKUserScript {
        let userScriptSource = "window.webkit.messageHandlers.notification.postMessage({body: \"Hi from javascript\"});"
        let userScript = WKUserScript(source: userScriptSource,
                                      injectionTime: .atDocumentEnd,
                                      forMainFrameOnly: true)
        return userScript
    }

