debounced-input

components.debounced-input.js

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

const {
  Component,
  assert,
  get,
  set,
} = Ember;

export default Component.extend({
  tagName: 'input',
  attributeBindings: ['type', 'placeholder', 'value', 'name', 'tabindex'],

  // bound attributes
  type:         'text',
  placeholder:  '',
  value:        undefined,
  name:         undefined,
  tabindex:     undefined,

  /**
   * Delay before performing update callback
   */
  timeout: 150,

  /**
   * Initial value
   */
  initValue: undefined,

  /**
   * Callback to update property
   */
  update: () => assert('debounced-input: You must supply a closure action named `update`'),

  _updateValue: task(function* (value) {
    set(this, 'value', value);
    yield timeout(get(this, 'timeout'));
    return get(this, 'update')(value);
  }).restartable(),

  /**
   * keyUp event
   * @param {Object} e
   */
  keyUp(e) {
    get(this, '_updateValue').perform(e.target.value);
  },

  /**
   * Init the component
   */
  init() {
    this._super(...arguments);

    set(this, 'value', get(this, 'initValue'));
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  callCount: 0,
  value: null,
  
  actions: {
  	updateValue(value) {
      this.incrementProperty('callCount');
    	this.set('value', value);
    }
  }
});

templates.application.hbs

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

<p>Controller was set: {{callCount}} times</p>
<p>Controller value is: {{value}}</p>

{{debounced-input update=(action (mut value))}}
<br>
<br>

templates.components.debounced-input.hbs

<input value={{value}} oninput={{action "updateValue" value="target.value"}}>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-concurrency": "0.8.3"
  }
}