I need a method like "onAfterAjax"

I want to show loading proccess of all requestr in one place. I know there is a onBeforeAjax method, so i may show loading process, but i don’t know any method that i may use to hide loading process after request is done

There is no a single point to catch end of all ajax requests.

Technically, it possible to create a custom proxy, that will provide the necessary handler.

http://docs.webix.com/desktop__server_proxy.html

Is it needed to manually add to every ui object that interacts with ajax?

you can add a custom event handler to any view, or you can create a proxy, and just use the different way of URL writing, something like

url:“custom->some.php”

Also, you can redefine webix.ajax.$callback, this one is called after each successful request.

Thanks a lot! I’ve done my task using redefining webix.ajax.$callback

how to redefine webix.ajax.$callback ?

Hello,
As a solution, you can catch the global onBeforeAjax event (it will be triggered for all requests from the API):

webix.attachEvent("onBeforeAjax", 
    function(mode, url, params, x, headers, files, defer){
   //x is request object
   //defer is promise created for the request

   defer.then(function(data){
     console.log("response", data.json());
   }, function(x){
     console.log("err", x)
   });

});

Please, check the following snippet:
https://snippet.webix.com/o5eaa94n