Cross domain xhr request (No 'Access-Control-Allow-Origin') asp.net mvc5 (iis) fails?

Question

ASP.NET

Cross-domain xhr request fails (No 'Access-Control-Allow-Origin') asp.net mvc5 (iis) ?
I'm trying to make a cross-domain xhr request, it fails even though the web.config added the permission, what am I doing wrong?
Request via js-function call, I don't use the controller
Maybe something needs to be changed in IIS itself?
The essence of the problem (1.5 minutes)!!! https://youtu.be/_C3aLm1LqL0

Answer 1

The article helped me

Answer 2

So far partially solved the problem through ws