Array manager component?

components.input-list.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    updateItem(index, event) {
      this.list.set(index, event.target.value);
      if(this.list[this.list.length-1] !== '') {
        this.list.addObject('');
      }
    },
    doneEditing(index, event) {
      let value = event.target.value;

      if (value === '') {
        this.list.removeAt(index);
      } else {
        if (this.onAddItem) {
          this.onAddItem(value);
        }
      }
    },
  },
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  init() {
    this.set('list', ['a', 'b', 'c', '']);
  },
});

templates.application.hbs

<h1>Here's a sweet array manager</h1>
<br>
<br>
{{input-list list=list}}
<br>
<br>

templates.components.input-list.hbs

{{#each list as |item index|}}
    {{input
      type='text'
      value=item
      placeholder='Add new item to array'
      input=(action 'updateItem' index)
      change=(action 'doneEditing' index)}}
{{/each}}


<ul>
{{#each list as |item index|}}
  <li>{{index}}: {{item}}</li>
{{/each}}
</ul>

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}