Function

and (dependentKey) ComputedProperty public

Defined in packages/@ember/object/lib/computed/computed_macros.js:476

import { and } from '@ember/object/computed';

dependentKey

String

returns

ComputedProperty

computed property which performs a logical `and` on the values of all the original values for properties.

A computed property that performs a logical and on the original values for the provided dependent properties.

You may pass in more than two properties and even use property brace expansion. The computed property will return the first falsy value or last truthy value just like JavaScript's && operator.

Example

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19

import { and } from '@ember/object/computed';
import EmberObject from '@ember/object';

let Hamster = EmberObject.extend({
  readyForCamp: and('hasTent', 'hasBackpack'),
  readyForHike: and('hasWalkingStick', 'hasBackpack')
});

let tomster = Hamster.create();

tomster.get('readyForCamp'); // false
tomster.set('hasTent', true);
tomster.get('readyForCamp'); // false
tomster.set('hasBackpack', true);
tomster.get('readyForCamp'); // true
tomster.set('hasBackpack', 'Yes');
tomster.get('readyForCamp'); // 'Yes'
tomster.set('hasWalkingStick', null);
tomster.get('readyForHike'); // null