Function

oneWay (dependentKey) ComputedProperty public

Defined in packages/@ember/object/lib/computed/computed_macros.js:592

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

dependentKey

String

returns

ComputedProperty

computed property which creates a one way computed property to the original value for property.

Where computed.alias aliases get and set, and allows for bidirectional data flow, computed.oneWay only provides an aliased get. The set will not mutate the upstream property, rather causes the current property to become the value set. This causes the downstream property to permanently diverge from the upstream property.

Example

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

let User = EmberObject.extend({
  firstName: null,
  lastName: null,
  nickName: oneWay('firstName')
});

let teddy = User.create({
  firstName: 'Teddy',
  lastName: 'Zeenny'
});

teddy.get('nickName');              // 'Teddy'
teddy.set('nickName', 'TeddyBear'); // 'TeddyBear'
teddy.get('firstName');             // 'Teddy'