Detecting HTML textarea onkeyup event in JavaFX WebView

Question

I want to print the content of an HTML textarea inside WebView as soon as I type it.
PS: I tried listening to the keyEvent of webView for some reason it didn't work.

Answer 1

1. If you are trying to print content of JavaFX TextArea object into WebView then you should add listeners to TextArea not WebView.

2. If you are trying to listen for event in HTML TextArea tag inside HTML page in WebView you should add listeners to document model:

   // we need this to wait till document load
   webEngine.getLoadWorker().stateProperty().addListener(new ChangeListener<State>() {
       public void changed(ObservableValue ov, State oldState, State newState) {
           if (newState == Worker.State.SUCCEEDED) {
   
               // note next classes are from org.w3c.dom domain
               EventListener listener = new EventListener() {
                   public void handleEvent(Event ev) {
                       System.out.println(ev.getType());
                   }
               };
   
               Document doc = webEngine.getDocument();
               Element el = doc.getElementById("textarea");
               ((EventTarget) el).addEventListener("keypress", listener, false);
           }
       }
   });
   webEngine.loadContent("<textarea id='textarea'></textarea>");