Proxy Object - Private Properties

proxyObject.js

const handler = {
  get: function(obj, prop) {
    if (prop === 'id') { // Check if the id is being accessed
      throw new Error('Cannot access private properties!'); // Throw an error
    } else {
      return obj[prop]; // If it's not the id property, return it as usual
    }
  }
}

const person = {
  id: 1,
  name: 'Foo Bar'
}

const proxiedPerson = new Proxy(person, handler);

console.log(proxiedPerson.id);