Multi-add

components.multi-add.js

import Ember from 'ember';

export default Ember.Component.extend({
    actions: {
      addItem(item) {
        if (item) {
          this.get('field').pushObject(item);
          this.set('newValue', '');
        }
      },
      deleteItem(index) {
        this.get('field').removeAt(index);
      }
    }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function() {
  	return [1, 2, 3];
  }
});

templates.application.hbs

{{multi-add field=model placeholder="Add..."}}
<br>
{{outlet}}
<br>
<br>

templates.components.multi-add.hbs

{{#each field as |item index|}}
  <div>{{item}} <a {{action "deleteItem" index}}>x</a></div>
{{/each}}
{{input
  type="text"
  placeholder=placeholder
  class="input"
  value=newValue}}
<button {{action "addItem" newValue}}>+</button>

{{yield}}

twiddle.json

{
  "version": "0.8.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.5.1",
    "ember-data": "2.5.2",
    "ember-template-compiler": "2.5.1"
  }
}