ComponentLifecycle

application.controller.js

import Ember from 'ember';

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

application.template.hbs

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

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none'
});

Router.map(function() {
  this.route('user', {path:'user/:name'});
});

export default Router;

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
.error {
  color:red;
}

twiddle.json

{
  "version": "0.6.0",
  "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/2.3.1/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.3.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.2.0/ember-template-compiler.js"
  }
}

user-card.component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  capitalizedName:null,
  isCool:false,
  
  didReceiveAttrs(){
  		this.set('capitalizedName', Ember.String.capitalize(this.get('name')));
  },
  
  didInsertElement(){
    alert(this.$('.name').text());
  },
  
  didUpdateAttrs(){
  	this.set('isCool', false);
  }
  
});

user-card.template.hbs

<span class='name'>{{capitalizedName}}</span>
{{input type="checkbox" checked=isCool}}is cool

user.route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params){
  	return params.name;
  }
});

user.template.hbs

{{user-card name=model}}