store2.js

let store = {
  ...

  update: function(hash, data) {
    if (!this._users[hash]) this._initializeUserState(hash)

    console.log('🌑  => PREVIOUS STATE')
    console.log(this.getState(hash))

    this._users[hash] = _.merge(this._users[hash], data)

    console.log('🌕  => NEXT STATE')
    console.log(this.getState(hash))
  }
}