Simple / mapped list rerender

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  tagName: 'li',
  
  didRender() {
    console.log('didRender', this.get('item'));
  },
  
  didInsertElement() {
    console.log('didInsertElement', this.get('item'));
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  list: [],
  
  mappedList: Ember.computed.map('list', item => ({ name: item, id: item })),
  
  init() {
    this._super(...arguments);
    
    this.set('list', [...Array(10).keys()]);
  },
  
  actions: {
    add() {
      this.get('list').pushObject(this.get('list.length'));
    },
    
    addImmutable() {
      let length = this.get('list.length') + 1;
      this.set('list', [...Array(length).keys()]);
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>


<button {{action "add"}}>Add</button>
<button {{action "addImmutable"}}>Add immutable</button>

<hr>

<h3>Simple list</h3>
<ul>
{{#each list as |item|}}
	{{#my-component item=item}}{{item}}{{/my-component}}
{{/each}}
</ul>

<h3>Mapped list</h3>
<ul>
{{#each mappedList key="id" as |item|}}
	{{#my-component item=item}}{{item.name}}{{/my-component}}
{{/each}}
</ul>

templates.components.my-component.hbs

{{yield}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}