POST response from server

Webix JS
1

Good day ,

Can’t figure out the part with the callback

      webix.ajax().post("/log", params).then(function (data) {
            //this part
            alert(data.json().status);
       }

How should ‘data’ get the server response message. It just shows me that ‘json()’ property is undefined or null.

How i tried to do it :

I get values from Form , add an extra parameter then send it to the server . There check if the value match the value in databank and send a message if they match or not. ( Using NodeJS )

         if ($$("login").validate()) {
        
        var params = $$("login").getValues(); 
        params.exparam = "login"; /* extra Parameter */            
        
        webix.ajax().post("/log", params).then(function (data) {
            
            alert(data.json().status);

        }).fail(function (err) { 
            alert(err);
        });
    }           
}

Sorry , being still a beginner.

2

Please, try logging data to console to inspect its properties and methods.

3

The data.json() call will try to parse the response of server side, it may show the above error message when server side returns not-valid json

Try to add console.log(data.text()) to check the exact text of server side response, to be sure that it is a valid json.