proxy-observe.js

const obj = {};
const handler = {
  set(target, key, value) {
    console.table("Setting", key, value);
    target[key] = value;
  },
  deleteProperty(target, key) {
    console.log(`Deleting ${key}`);
    delete target[key];
  },
};

const proxyObj = new Proxy(obj, handler);