AngularJS Example:

HTML

<link rel="stylesheet" href="http://twitter.github.com/bootstrap/assets/css/bootstrap.css">
<div ng-app>
  <div ng-init="name='World'">
  <label>Name</label>
  <input ng-model="name" />
  <span>Hello, {{ name }}!</span>
  <p ng-bind="name"></p>
</div>
</div>