exportStoreBuild.js

export default listenerFunc => {
  Object.defineProperty(window.globalStore, "onChangeListener", {
    value: listenerFunc
  });
};

globalState.js

let Person =  {
    name: "test",
    age: "12"
  }

proxyInit.js

 window.globalStore = new Proxy(
 person,
  {
    get: function(target, value, r) {
      return value in target ? target[value] : undefined;
    },
    set: function(target, key, value, r) {
      target[key] = value;
      r.onChangeListener({ [key]: value });
    }
  }
);