Load method of combo ui control

Hi, I am using a Webix combo in a jsp that load data from a java servlet in a spring boot application using tomcat embedded application server. It works fine except when I filter combo data. When I search for a string a call is sent to the server with the parameter filter[value]=. Now the tomcat http server does not allow anymore (my version is tomcat 9.0.21) square brackets chars as parameter in a GET call. Is there a way to change the GET to POST method to load the combo ?

Hello @maxdod ,
You can specify the dataFeed property of the inner list, the solution is as follows:

dataFeed:function(str, params){
            if(!str.match(/\\w/g))
              return;
            const filter = {
              filter: params
            };
            return webix.ajax().bind(this).post(url, filter, function(data){
              this.parse(data);
            });
          }, 

Filtering does not work on the snippet (because there is no real backend to this demo), but you can see in the example of request sent to the server.
Please check the snippet:
https://snippet.webix.com/89r9rywf

thanks I will try !