AngularJS Example

HTML

<div ng-app="">
<span ng-init="count=0">count: {{count}}</span>
  <ul>
  <li ng-repeat="n in [1,2,3]"><button ng-click="$parent.count = $parent.count + n">{{n}}</li>
  </ul>
  
  <span ng-init="count=0">count: {{count}}</span>

<ul>
  <li ng-repeat="n in [1,2,3]"><button ng-click="$parent.count = $count + n">{{n}} {{count}}</li>
</ul>
</div>

CSS

</style> <!-- Ugly Hack due to jsFiddle issue: http://goo.gl/BUfGZ --> 
<script src="http://docs.angularjs.org/angular-1.0.1.min.js"></script>
<style>
.ng-invalid { border: 1px solid red; }