Customize component blocks

components.attendee-card.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  actions: {
    registerProfile(profile) {
      this.set('profile', profile);
    }
  }
});

components.attendee-card.x-button.js

import Ember from 'ember';

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

components.attendee-card.x-profile.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);
    this.get('did-init')();
  },
  
  name: 'Josh Smith'
});

components.data-catcher.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);
    
    this.get('on-init')(this);
  }
});

controllers.application.js

import Ember from 'ember';

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

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}
button {
  font-size: 18px;
  margin: 20px;
}

.AttendeeCard {
  display: flex;
  border: 1px solid red;
}
.AttendeeCard-panel {
  flex: 1;
  text-align: center;
}

templates.application.hbs

{{#attendee-card as |ac|}}
{{/attendee-card}}

{{#attendee-card as |ac|}}
  {{#ac.profile}}
    Sam Selikoff
  {{/ac.profile}}
{{/attendee-card}}

templates.components.attendee-card.hbs

{{yield (hash
  profile=(component 'attendee-card/x-profile' did-init=(action 'registerProfile'))
)}}

<div class='AttendeeCard'>
  <div class='AttendeeCard-panel'>
    {{#unless profile}}
      {{attendee-card/x-profile}}
    {{/unless}}
  </div>

  <div class='AttendeeCard-panel'>
    {{attendee-card/x-button}}
  </div>
</div>

templates.components.attendee-card.x-button.hbs

<button style=''>
  Arrive
</button>

templates.components.attendee-card.x-profile.hbs

<h2>
  I am 
  {{#if hasBlock}}
    {{yield}}
  {{else}}
    Default
  {{/if}}
</h2>

templates.components.data-catcher.hbs

{{!-- yield --}}

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}