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JavaFX JSBridge doesn't work after page load

I have a strange problem; JSBridge doesn't work after the page loads but it does when the button is clicked.

Test site:

<!DOCTYPE html>

<html>
    <head>
        <meta charset="utf-8" />
    </head>

    <body bgcolor="#A0BEC4">
        <input type="button" value="PLAY" onclick="play()"><br><br>

        <script>
            window.onload = function() { //does not work
                stb.play("hello3"); 
            }

            function play() { // work
                stb.play("hello2"); 
            }

            window.addEventListener('load', (event) => {
                stb.play("hello4"); //does not work
            });

            stb.play("hello"); //does not work

            function checkJSBridge(){ // !!! WORK !!! 
                if (typeof (stb.play) === "function") {
                    stb.play("WORK");
                    clearTimeout(bridge_timer);
                }
            }

            let bridge_timer = setTimeout(checkJSBridge, 1000);
        </script>
    </body>
</html>

My code (JavaFX 18.0.1 and JDK 18.0.1.1):

private WebEngine webEngine = webView.getEngine();
private Worker<?> engineWorker = webEngine.getLoadWorker();
private JSBridge bridge = new JSBridge();

@Override
public final void start(Stage stage) throws Exception {
    engineWorker.stateProperty().addListener(new ChangeListener<Worker.State>() {
        @Override
        public void changed(ObservableValue ov, Worker.State oldState, Worker.State newState) {
            if (newState == State.SUCCEEDED) {
                JSObject jsobj = (JSObject) webEngine.executeScript("window");
                jsobj.setMember("stb", bridge);
            }
        }
    });
}
about 4 years ago · Juan Pablo Isaza
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