render loop

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  init() {
    this._super(...arguments);
    this.sendAction('register', this);
  }
});

components.my-parent.js

import Ember from 'ember';
import RSVP from 'rsvp';

export default Ember.Component.extend({
  didReceiveAttrs() {
    this._super(...arguments);
    this._doAsyncWork().then(() => {
      this.rerender();
    });
  },
  
  _doAsyncWork() {
    return RSVP.resolve();
  },
  
  didRender() {
    console.log('rendered'); 
  },
  
  actions: {
    register(child) {
      console.log('registering child');
      if (this.get('child')) {
      	throw new Error('already got a child');
      }
      this.set('child', child);
    }
  }
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  version: Ember.VERSION
});

templates.application.hbs

Ember version: {{version}}<br><br>

{{#my-parent as |p|}}
  {{p.child}}
  {{p.child}}
{{/my-parent}}

templates.components.my-component.hbs

-> Child

templates.components.my-parent.hbs

Parent<br>

{{yield (hash
  child=(component 'my-component' register=(action 'register'))
)}}

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": "2.11.2",
    "ember-template-compiler": "2.11.2",
    "ember-testing": "2.11.2"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}