hide.js

const mySecretAwareObject = {
    login: "foo",
    password: "haha"
}

Object.defineProperty(mySecretAwareObject, "password", {
    enumerable: false,
    value: 'supersecretpassword'
})

console.log(mySecretAwareObject) // prints object without password field value
console.log(mySecretAwareObject.password) // password is still available via direct access though
// output
// { login: 'foo' }
// supersecret