cancel typeahead

controllers.application.js

import Ember from 'ember';
import {task, timeout} from 'ember-concurrency';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  typeAheadTask: task(function * (value) {
    yield timeout(500);
    return value
  }), // you can cancel or whatever you like
  
  actions: {
    startTask(value){
      this.get('typeAheadTask').perform(value);
      this.set('value', value);
  }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}

{{one-way-input value update=(action 'startTask')}}

<br>
results:
<br>
{{#if (and typeAheadTask.isRunning (not typeAheadTask.isIdle))}}
  searching
 {{else}}
 {{typeAheadTask.last.value}}
{{/if}}

<br>
<br>

twiddle.json

{
  "version": "0.11.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.11.0",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.11.0",
    "ember-testing": "2.11.0"
  },
  "addons": {
    "ember-one-way-controls": "*",
    "ember-truth-helpers": "*",
    "ember-concurrency": "*"
  }
}