Safe Strings Insertion

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  actions : {
    setAttribute: function( ){
      		
      //alert(new Ember.Handlebars.SafeString("{'key':'value'}"));
// Ember.$("#myDiv").attr("data-close",new Ember.Handlebars.SafeString("{'key':'value'}"));
      
     // Ember.String.htmlSafe("{'key':'value'}");
      
      Ember.$("#myDiv").attr("data-close",Ember.String.htmlSafe("{'key':'value'}"));
      
// Ember.$("#myDiv").attr("data-close",{"key":"value"});    
    
      this.set("content",Ember.$("#contentHolder").html());
    }
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<span>
<input type="checkbox" id="title" value="title" name="values" checked />
</span>
<label for="title">Title</label>
 
<span>
<input type="checkbox" id="close" value="close" name="values" />
</span>
<label for="close">Close Button</label>
  
<span>
<input type="checkbox" id="arrow" value="pointer" name="values" checked />
</span>
<label for="arrow">Arrow</label>

<span>
<input type="checkbox" id="detachable" value="detachable" name="values" />
</span>
<label for="detachable">Detachable</label>

<button {{action "setAttribute"}}> Show Content </button>
{{outlet}}
<br/>
<br/>
<br/>
<div>
{{content}}
</div>

{{!-- data-action="{'key':'value'}" --}}

<div id="contentHolder" style="display:none;">
<div id="myDiv" data-action="{'key':'value'}" >
Karthika
</div>
</div>

<br>
<br>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}