if you don't want to make major changes, you can consider adding pointer-events:none; to all img tags (of course, those with events should drop Filter); if you are not afraid of changes, go directly to Canvas. If the interface is complex, you can consider finding a UI system to do it, which is not difficult.

$("body").on("contextmenu", "img", function(e) {
  return false;
});

https://stackoverflow.com/que.

img bind touch event
return fasle;
this applies to img without event

the background image cannot be downloaded.