Auto

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  filter: null,
  filteredList: null,
  actions: {
    autoComplete() {
      let filteredList = this.get('autoComplete')(this.get('filter'));
      this.set('filteredList', filteredList);
    },
    choose(city) {
      this.set('filter', city);
      this.set('filteredList', null);
    }
  }
});

controllers.application.js

import Ember from 'ember';

var testData = ['Atlanta', 'Raleigh', 'NYC', 'Chicago', 'Detroit', 'Carry', 'Morrisville']

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  cities: [],
  actions: {
    autoComplete(param) {
      if (param !== '') {
        var results = testData.filter(function(o){
        	return o.toLowerCase().indexOf(param.toLowerCase()) !== -1;
        })
        return results;
      } else {
        return null;
      }
    },
  	addField() {
          this.get('cities').pushObject({})
    }
	
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
{{#each cities as |city|}}
  {{my-component 
  autoComplete=(action 'autoComplete')}}
{{/each}}
<a href="#" {{action 'addField'}}>Add city</a>

<br>
<br>

templates.components.my-component.hbs

City: {{input value=filter key-up=(action 'autoComplete')}} 

<ul>
{{#each filteredList as |item|}}
  <li {{action 'choose' item}}>{{item}}</li>
{{/each}}
</ul>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js"
  }
}