EmberJS basics cheatsheet

gistfile1.js

// Based on concepts learned in ch 3 of http://ember.vicramon.com/the-ember-object

// defining objects
App.InternetUser = Ember.Object.extend();
App.InternetUser.reopen({
  intelligence: -50,
  status: 'anonymous'
});

// computed properties
App.InternetUser.reopen({
  isSmart: function() {
    if (this.get('intelligence') > 0) { return true; }
    else { return false; }
  }.property('intelligence')
})

// observers
App.InternetUser.reopen({
  intelligenceChanged: function() {
    if (this.get('intelligence') > 0) { alert('are you sure?') }
  }.observes('intelligence')
})


// instantiating
var user = App.InternetUser.create();
user.get('isSmart')  // false
user.set('intelligence', user.get('intelligence') + 65);
// alert pops up from observer
user.get('isSmart')  // true