Function

observer (propertyNames, func) public

Module:	@ember/object

Defined in packages/ember-metal/lib/mixin.js:735

import { observer } from '@ember/object';

propertyNames

String

func

Function

returns

func

Specify a method that observes property changes.

import EmberObject from '@ember/object';
import { observer } from '@ember/object';

export default EmberObject.extend({
  valueObserver: observer('value', function() {
    // Executes whenever the "value" property changes
  })
});

Also available as Function.prototype.observes if prototype extensions are enabled.