JSFiddle - React, Tailwind, and code Playground

JavaScript

//const myVar = '';
const configDefault = {
  Bot: {
    // initial sessionAttributes
    sessionAttributes: {},
  },
};
$(document).ready(function(){
configDefault.Bot.sessionAttributes.ip = myIP();
 // undefined
});

function myIP() {
    $.getJSON("//freegeoip.net/json/?callback=?", function(data) {
        //console.log(data.ip);
        return data.ip;
    });
}
console.log("myVar:",configDefault.Bot.sessionAttributes);
//console.log("myVar:", myVar );