JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://github.com/downloads/wycats/handlebars.js/handlebars-1.0.0.beta.6.js"></script>
<script src="https://github.com/downloads/emberjs/ember.js/ember-1.0.pre.js"></script>

JavaScript

App = Ember.Application.create();

App.TestObj = Ember.Object.extend({
    testProp: null,
    
    init: function() {
        this.set('testProp', []);
        this._super();
        console.log('before init', this.get('testProp'));
        this.get('testProp').pushObject({'test': true});
    },
    
    willDestroy: function() {
        console.log('before destroy', this.get('testProp'));
        this._super();
        this.set('testProp', []);
        console.log('after destroy',this.get('testProp'));
    }
});

var test = App.TestObj.create();
test.destroy();
App.TestObj.create();