AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <div ng-controller="TodoCtrl">
  {{xxx}}
  </div>
</div>

JavaScript

function TodoCtrl($scope) {
  $scope.xxx = 'reqwresadadasdassdadq';
}