The client does not display .gifs in IE, can this be fixed?

Question

JavaScript

So it goes. Here's Mr site . At the stage of improvement.
Here, with the help of JS, .gif are loaded.
The customer reports that he does not display .gif in IE.
I can’t test it myself, because I have a mac and there is no place for Windows in it.
Earlier I heard and now I read that this may be the initiative of the browser - they say, it blocks gif-images embedded with js scripts, considering them garbage and advertising. Is it so?
Can this be corrected at the moment?
UPD: found out that it's a promise, which IE does not understand and gives errors. What can be done about it?

Answer 1

Apparently, they forgot to connect the polyfill, it is not in the new babel.

Answer 2

Do you think you are the first one who typesets on a Mac and who needs to check the layout in IE? No, so here: cloudinternetexplorer.com

Answer 3

There are not only no blocks with pictures, but the fonts are miserable. Why are you using js?