Radio Demo

components.form-demo.js

import Ember from 'ember';

export default Ember.Component.extend({  
  showMore: Ember.computed('value', function () {
  	return this.get('value') === 'one';
  }),
  
  actions: {
  	onChange(value) {
			this.set('value', value);
    },
  },
});

controllers.application.js

import Ember from 'ember';

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

templates.application.hbs

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

{{outlet}}

{{form-demo}}

templates.components.form-demo.hbs

<label>
	<input type="radio" name="foo" value="zero" onchange={{action "onChange" "zero"}}>
  Zero
</label>

<label>
	<input type="radio" name="foo" value="one" onchange={{action "onChange" "one"}}>
	One
</label>

{{#if showMore}}
  <p>Showing more thingies!</p>
{{/if}}

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"
  }
}