Ember.computed.none()

A computed property that returns true if the value of the dependent property is null or undefined. This avoids errors from JSLint complaining about use of ==, which can be technically confusing.

Example

let Hamster = Ember.Object.extend({
  isHungry: Ember.computed.none('food')
});

let hamster = Hamster.create();

hamster.get('isHungry'); // true
hamster.set('food', 'Banana');
hamster.get('isHungry'); // false
hamster.set('food', null);
hamster.get('isHungry'); // true