javascript - Bug murder caused by imgzoom plug-in! ! ! !

Question

I use the magnifying glass made by the imgzoom plug-in.

The part circled by the red box will change the height to 0 as the page is pulled down

It becomes like this
The code is as follows
var ToTopFun = function() {

    $('.header-title').css('height', '0px')
    $('.upup').hide()
    var st = $(document).scrollTop();
    if(st > 0) {
        if($(".topbanner").hasClass('active')) {
            $(".topbanner").removeClass('active');
            $('.header-title').css('height', '0px')
        }
        $('.upup').show()

    } else {
        $('.header-title').css('height', '38px')
        $(".topbanner").addClass('active');
        $('.upup').hide()
    }
};
$(window).bind("scroll", ToTopFun);
ToTopFun();

The above are normal but! ! ! ! ! ! ! ! ! !

If the mouse is always on the magnifying glass, the height changes as the hidden part above increases.
This box will move up, and the grid-shaped IMG next to it will also move up. When you pull down, you cannot reach the bottom of the small picture.
The less height is the added part above.
I am wondering if I can disable the plug-in when increasing the height, or use other methods. I have no idea at all. I can't see it even if I look at the imgzoom API.
Please ask God to solve it.
Do I need to change the plug-in? ! ! ? ? ! ! !

Answer 1

I was forced to change the plug-in. I can’t understand it even if I look at the source code of the plug-in