traverse object tree in javascript

traverse.ts

//this will hopefully run in debug mode
//https://www.jetbrains.com/help/webstorm/running-and-debugging-node-js.html#ws_node_debugging_debugger_console
function traverse(o ) {
    for (i in o) {
        if (!!o[i] && typeof(o[i])=="object") {
          // use typescript instanceof operator here 
          // we should be able to travel to desired type
            console.log(i, o[i])  
            traverse(o[i] );
        }
    }
}

//another example:
function traverse(jsonObj) {
    // use typescript instanceof operator here 
    // we should be able to travel to desired type
    if( typeof jsonObj == "object" ) {
        Object.entries(jsonObj).forEach(([key, value]) => {
            // key is either an array index or object key
            traverse(value);
        });
    }
    else {
        // jsonObj is a number or string
    }
}

//for nulls call this one:
class InstanceLoader {
    static getInstance<T>(context: Object, name: string, ...args: any[]) : T {
        var instance = Object.create(context[name].prototype);
        instance.constructor.apply(instance, args);
        return <T> instance;
    }
}