New Twiddle

components.special-tag.js

import Ember from 'ember';

export default Ember.Component.extend({
  name: 'special tag!'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  summary: [
    'tag 1 (plain string)',
    '<span style="color: orange;">tag 2 (style attr)</span>',
    '{{special-tag name="tag 3 (component)"}}',
    '{{component "special-tag"}}',
    'some string plug component {{special-tag}}'
  ]
});

styles.app.css

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

.tag {
  border: 1px solid red;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{#each summary as |tag|}}
 
  <span class="tag">{{{tag}}}</span>
  <br>
  <br>
  
{{/each}}

templates.components.special-tag.hbs

<span>{{name}}<span>

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}