JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://cloud.github.com/downloads/emberjs/ember.js/ember-latest.js"></script>
<script type="text/x-handlebars">
    {{#view App.TestView}}
        Change this: {{view Ember.TextField valueBinding="count"}}<br /><br />
        No Property: {{double}}<br />
        With Property: {{propertyDouble}}
    {{/view}}
</script>

JavaScript

App = Ember.Application.create()
    
App.Outer = Ember.Object.create({
    count: 1,
    
    propertyDouble: function() {
         return this.get('count') * 2;  
    }.property('count'),
    
    double: function() {
        return this.get('count') * 2;
    }.property('nothing')
});
                                
App.TestView = Ember.View.extend({
    doubleBinding: 'App.Outer.double',
    propertyDoubleBinding: 'App.Outer.propertyDouble',
    countBinding: 'App.Outer.count'
});