envoy-thing

components.visitor-form.js

import Ember from 'ember';

const { get } = Ember;

export default Ember.Component.extend({
  tagName: 'form',
  name: '',
  submit(ev) {
    ev.preventDefault();
    
  	let signIn = get(this, 'signIn');
  	let name = get(this, 'name');

  	signIn(name);
	}
});

controllers.application.js

import Ember from 'ember';

const { get, set } = Ember;

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  lastId: 1,
  people: [{
    id: 0,
  	name: 'eric'
  }, {
    id: 1,
    name: 'robbie'
  }],
  actions: {
    signOut(personId) {
      let people = get(this, 'people');
      let newPeople = people.filter(person => {
        return person.id !== personId;
      });
      
      set(this, 'people', newPeople); 
    },
    
    signIn(name) {
      let people = get(this, 'people');
      let id = get(this, 'lastId') + 1;
      let newPerson = {
        id,
        name
      };
      
      set(this, 'people', people.concat(newPerson));
      set(this, 'lastId', id);
    }
  }
});

templates.application.hbs

<h1>Sign in</h1>

{{visitor-form signIn=(action "signIn")}}

<ul>
{{#each people as |person|}}
	<li>{{person.name}}
  	<button onclick={{action "signOut" person.id}}>Sign Out</button>
  </li>
{{/each}}
</ul>

templates.components.visitor-form.hbs

<label for="name">Name</label>
<input id="name" name="name" oninput={{action (mut name) value="target.value"}} />
<input type="submit" />

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"
  }
}