My-Popover

components.my-popover-content.js

import Ember from 'ember';

export default Ember.Component.extend({
  isVisible: false
});

components.my-popover.js

import Ember from 'ember';

export default Ember.Component.extend({
  isPopoverVisible: false,
  actions: {
    togglePopover() {
      console.log("Action executed!");
      this.toggleProperty('isPopoverVisible');
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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

{{#my-popover as |popover|}}
	<span {{action 'togglePopover' target=popover}}>
    Click
  </span>
  {{#popover.content}}
  	Some content!
  {{/popover.content}}
{{/my-popover}}

templates.components.my-popover-content.hbs

{{yield}}

templates.components.my-popover.hbs

{{yield (hash 
	content=(component 'my-popover-content' isVisible=this.isPopoverVisible)
)}}

twiddle.json

{
  "version": "0.7.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.3/ember-template-compiler.js"
  }
}