NoteEditorViewController.swift

 func focusEditor() {
       let loc =  CGPoint(x: (textView!.frame.origin.x + (textView!.frame.size.width / 2)),
                y: (textView!.frame.origin.y + (textView!.frame.size.height / 2)))

        let realLoc = textView!.convert(loc,
                                        to: nil)
       


        let e = NSEvent.mouseEvent(with: .leftMouseDown,
                                   location: realLoc,
                                   modifierFlags: [],
                                   timestamp:ProcessInfo.processInfo.systemUptime ,
                                   windowNumber: textView!.window!.windowNumber,
                                   context: nil,
                                   eventNumber: 0,
                                   clickCount: 1,
                                   pressure: 0.0)
       
        
        textView?.mouseDown(with: e!)
        
//        let f = WKUserScript(source: "quill.focus();",
//                             injectionTime: .atDocumentEnd,
//                             forMainFrameOnly: false)
//        textView?.evaluateJavaScript(f.source,
//                                     completionHandler: { (obj, err) in
//                                        SwiftyBeaver.debug("focued")
//        })
    }

(lldb) po err!
Error Domain=WKErrorDomain Code=4 "A JavaScript exception occurred" UserInfo={WKJavaScriptExceptionLineNumber=1, WKJavaScriptExceptionMessage=TypeError: null is not an object (evaluating 'document.getElementById('editor').click'), WKJavaScriptExceptionColumnNumber=34, WKJavaScriptExceptionSourceURL=undefined, NSLocalizedDescription=A JavaScript exception occurred}