Custom Zoom Buttons – destroy() not fully removing them

I’ve got custom elements set for my zoomInButton and zoomOutButton:

OpenSeadragon({
   ...
   zoomInButton:  "zoomInDiv",
   zoomOutButton: "zoomOutDiv",
   ...
});

After destroying a Viewer and subsequently creating a new one, these zoom buttons still work but also log the following errors to the console: – Cannot set property 'lastZoomTime' of undefined – Cannot set property 'zooming' of undefined

Screenshot of the console included as well:

_Originally posted by @mattwolff in https://github.com/openseadragon/openseadragon/issues/1878#issuecomment-731474734_

[DannyJoris]

If you’re in a situation like us where you can’t upgrade to 3.0.0 yet, this is a workaround that worked for us:

viewer.zoomInButton.tracker.destroy();
viewer.zoomOutButton.tracker.destroy();
viewer.destroy();

[mattwolff]

Yes, just tested it out and this is no longer an issue – amazing overhaul.