WebView callback from Javascript

Question

I tried to create a simple example of callback from Javascript to Java, based on the last example in WebEngine\'s javadoc (Calling back to Java from JavaScript). Bu

Answer 1

You are trying to access webview DOM model before it was created.

Wrap your JavaApp related code to the page load listener to achieve your goal:

webEngine.getLoadWorker().stateProperty().addListener(new ChangeListener<Worker.State>() {
    @Override
    public void changed(ObservableValue<? extends State> ov, State t, State t1) {
        if (t1 == Worker.State.SUCCEEDED) {
            JSObject window = (JSObject) webEngine.executeScript("window");
            window.setMember("app", new JavaApp());
        }
    }
});