Observer Pattern pt3

fluxcontroller.js

class FluxController extends EventEmitter {
  constructor(model, view) {
    super()
    this.model = model
    this.view = view

    // add event listeners for changes to our model state
    model.addEventListener('daytime', () => this.changeViewToDaytime())
    model.addEventListener('nighttime', () => this.changeViewToNighttime())

    // set the initial state
    model.isNighttime ? this.changeViewToNighttime() : this.changeViewToDaytime()
  }

  changeViewToDaytime() {
    this.view.body.style.color = '#000'
    this.view.body.style.backgroundColor = '#fff'
  }

  changeViewToNighttime() {
    this.view.body.style.color = '#fff'
    this.view.body.style.backgroundColor = '#000'
  }
}