Yield

components.blog-post.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'
});

routes.index.js

import Route from '@ember/routing/route';

export default Route.extend({
  model() {
    //return this.store.findAll('post');
    return [
      {id: 1, title: "Article1", body: "Content1", author: "Author1"},
      {id: 2, title: "Article2", body: "Content2", author: "Author2"},
      {id: 3, title: "Article3", body: "Content3", author: "Author3"},
    ];
  }
});

templates.application.hbs

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

templates.components.blog-post.hbs

<article class="blog-post">
  <h1>{{this.title}}</h1>
  <p>Here is yielded from: {{yield @post.title @post.body @post.author}} </p>
  <label for="title">Blog Title</label>
  <p>Edit title: {{input id="title" type="text" value=this.title}}</p>
</article>

templates.index.hbs

<BlogPost @post={{this.model}} as |title body author|>
  <h2>{{title}}</h2>
  <p class="author">by {{author}}</p>
  <p class="post-body">{{body}}</p>
</BlogPost>

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"
  }
}