usage.js

actions: {
  successAction() {
    Ember.get(this, 'flashes').success('Success!', 2000);
  },

  warningAction() {
    Ember.get(this, 'flashes').warning('This is a warning message'); // timeout is optional
  },

  infoAction() {
    Ember.get(this, 'flashes').info('You just did something...', 500);
  },

  dangerAction() {
    Ember.get(this, 'flashes').danger('So danger');
  },

  customAction() {
    Ember.get(this, 'flashes').addMessage('This is a flash with a custom type', 'myCustomType', 3000)
  },

  clearMessages() {
    Ember.get(this, 'flashes').clear(); // clears all visible flash messages 
  }
}