Add and Remove Sample

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
  
  init() {
    this._super(...arguments);
    this.foos = [];
  },
  
  actions: {
    addFoo() {
      let newFoo = this.store.createRecord('foo');
      this.get('foos').pushObject(newFoo);
    },
    deleteFoo(foo) {
      //foo.rollbackAttributes();
      this.get('foos').removeObject(foo);
      //this.store.unloadRecord(foo);
    }
  }
});

application.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<button type="button" {{action 'addFoo'}}>Add a Foo</button>
<ul>
{{#each foos as |foo|}}
  <li>
    {{x-foo foo=foo delete=(action "deleteFoo")}}
  </li>
{{/each}}
</ul>

<br>
<br>

models.foo.js

import DS from 'ember-data';

export default DS.Model.extend({
  name: DS.attr('string')
});

twiddle.json

{
  "version": "0.5.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "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/2.2.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.2.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}

x-foo.component.js

import Ember from 'ember';

export default Ember.Component.extend({
});

x-foo.template.hbs

{{input value=foo.name}}
<button type="button" {{action delete foo}}>Delete a Foo</button>