GWT and Javascript JSNI for Scroll To Top Button

Hello,

I'm trying to integrate a jQuery code in my GWT application without success for a button to top:

        public static native void fadeInOutAction() /*-{

                // back-to-top

                if ($wnd.$(this).scrollTop() > 100) {

                        $wnd.$('.scrollToTop').fadeIn();

                } else {

                        $wnd.$('.scrollToTop').fadeOut();

                }

       }-*/;

It seems not to detect the scroll event or my code is wrong.

Here is the original code for HTML CSS Javascript : http://www.paulund.co.uk/how-to-create-an-animated-scroll-to-top-with-jquery

The scroll to top action works great but when I want to display the button when I scroll to down, the button stay hidden.

Can you help me to understand?

Thank you.

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