New Twiddle

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    startEdit(item) {
    },
    startDelete(item) {
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  items: ["1", "2", "9"],
  actions: {
    reorderItems() {
    }
  }
});

templates.application.hbs

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

templates.components.my-component.hbs

<div class = "handle">
  {{item}}
  <button {{action "startEdit" item}}>EDIT</button>
  <button {{action "startDelete" item}}>DELETE</button>
</div>

templates.index.hbs

<style>
ul {
 list-style-type: none;
}
ul li {
  cursor: pointer;
}
</style>

Test

{{#sortable-group tagName="ul" model=items onChange=(action "reorderItems") as |group|}}
  {{#each group.model as |modelItem|}}
    {{#group.item model=modelItem as |item|}}
      {{#item.handle}}
      	{{my-component item=modelItem}}
      {{/item.handle}}
    {{/group.item}}
  {{/each}}
{{/sortable-group}}

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",
    "ember-sortable": "2.1.1"
  }
}