observer-example-1.js

import Ember         from 'ember';
import notifyParents from 'notify-parents';
 
var observer = Ember.observer;
var computed = Ember.computed;
var not      = computed.not;
var get      = Ember.get;
 
export default Ember.Object.extend({
  firstName: 'Lauren',
  lastName:  'Tan',
  isAtHome:  false,
  
  isOutside: not('isAtHome'),
  
  fullName: computed('firstName', 'lastName', function() {
    return get(this, 'firstName') + ' ' + get(this, 'lastName');
  }),
  
  notifyParentsWhenAtHome: observer('isAtHome', function() {
    var userIsAtHome = get(this, 'isAtHome');
    if (userIsAtHome) {
      notifyParents(get(this, 'fullName'), new Date());
    }
  })
});