New Twiddle

components.child-component.js

import Ember from 'ember';

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

components.parent-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  
  didInsertElement() {
    this._super(...arguments);
    document.getElementById('box-5').scrollIntoView({
      behavior: 'smooth'
    });
  }
  
});

controllers.application.js

import Ember from 'ember';

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

styles.app.css

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

.box {
  height: 300px;
  background-color: #f5f5f5;
  margin: 20px;
}

templates.application.hbs

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

{{parent-component}}

templates.components.child-component.hbs

{{yield}}

<div id="box-{{index}}" class='box'>
{{index}}
</div>

templates.components.parent-component.hbs

{{yield}}
{{child-component index=0}}
{{child-component index=1}}
{{child-component index=2}}
{{child-component index=3}}
{{child-component index=4}}
{{child-component index=5}}
{{child-component index=6}}
{{child-component index=7}}
{{child-component index=8}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}