javascript proxy for nested object

proxy_nested_obj.js

var traps = {
  get(target, propName, receiver) {
    const val = Reflect.get(target, propName, receiver);
    if (typeof val === 'object' && val !== null) {
      return new Proxy(val, traps);
    }
    else {
      return val;
    }
  },
  set(target, propName, value, receiver) {
    log("set", {target, propName, value, receiver});
    return Reflect.set(target, propName, value, receiver);
  },
}
var p = new Proxy(obj, traps);