c# Pass a domainurl address to the front end. The code written by c# to the front end is as shown in Figure 1.
This is a self-tuning function. If my front end wants to get this domainurl, how can I directly console.log(cefRuntimeInfo. domainurl), the address can be obtained directly, but if the function setRuntimeInfo is called, the error domain.url is not defined will be reported;
c# is written as follows:

//c#输出前端配置文件
        public static string domainurl = "http://test.edu.com.cn:8080"; 
//网页加载完成时触发事件
            LoadHandler.OnLoadEnd += (sender, args) =>
            {
                //判断下触发的事件是不是主框架的
                if (args.Frame.IsMain)
                {
                    //ShowDevTools();W
                    //执行JS，将当前的CEF运行版本等信息通过JS加载到网页上
                    var js = $"$client.setRuntimeInfo({{ domainurl:'{domainurl.ToString()}'}});";
                    ExecuteJavascript(js);
                }


            };

        }

[I am a front-end, please give me some advice on how to get the domainurl as my ajax interface address]