New Twiddle

components.comp-one.js

import Ember from 'ember';

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

components.comp-two.js

import Ember from 'ember';

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

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

--
<br/>

{{#comp-one as |comp|}}

	some data!
  {{comp.zz}}
  
  {{comp.two
  		ww='wwwwwwwwww'
  }}

{{/comp-one}}

--
<br/>

templates.components.comp-one.hbs

<div class="some-wrapper">
	comp one stuff!

	{{yield
  	
    (hash
    	zz='zzzzz'
      two=(component 'comp-two'
      	ww='should not override'
      )
    )
  }}

</div>	

templates.components.comp-two.hbs

{{yield}}

comp two!


{{ww}}

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}