JSFiddle - React, Tailwind, and code Playground

JavaScript

var theObject = {
    key1: {
        something: "else"
    },
    key2: "string"
}

function logIt(it) {
    console.log(it);
}

function objectWalk (obj, callback){
    for(o in obj){
        if(typeof obj[o] === 'object'){
            objectWalk(obj[o], callback);
        }else {
            callback(obj[o]);
        }
    }
}

objectWalk(theObject, logIt);