Asp.Net 4 async support in IE11 client side or what are the alternatives?

Question

ASP.NET

In WebApp, WebServices (asynchronous) are used to communicate the client side with the server.
There is an urgent need to use IE 11, but since the browser has shitty support on the js side, you have to deal with asynchrony with stupid methods by nesting other methods in the response.
I would like to use promises with async, but we run into browser support.
Are there alternatives? Or how to enable js syntax support in IE 11.

Answer 1

There is only babel, or other polyfills.
https://stackoverflow.com/questions/58773129/how-t...
What does asp net 4 have to do with it I don't understand