Navbar didnt collapse with Angular – Twitter bootstrap

I’m trying to use bootstrap.css with Angular. I referenced Twitter Bootstrap Navbar with AngularJS – Collapse Not Functioning but when I try to implement this code, my navbar doesn’t collapse and the dropdown doesn’t work either.

Code:

<nav id="navbar-example" class="navbar navbar-inverse navbar-static" role="navigation" ng-controller="NavBarCtrl">
  <div class="container-fluid">
    <div class="navbar-header">
      <button class="navbar-toggle" type="button" ng-click="isCollapsed = !isCollapsed">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <a class="navbar-brand" href="#">Title</a>
    </div>
    <div collapse="isCollapsed" class="navbar-collapse bs-js-navbar-collapse">
      <ul class="nav navbar-nav">
      <li><a href="">home</a></li>
        <li class="dropdown">
          <a id="drop1" href="#" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown <b class="caret"></b></a>
          <ul class="dropdown-menu" role="menu" aria-labelledby="drop1">
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://twitter.com/fat">Action</a></li>
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://twitter.com/fat">Separated link</a></li>
          </ul>
        </li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li id="fat-menu" class="dropdown">
          <a href="#" id="drop3" role="button" class="dropdown-toggle" data-toggle="dropdown">Dropdown 3 <b class="caret"></b></a>
          <ul class="dropdown-menu" role="menu" aria-labelledby="drop3">
            <li role="presentation"><a role="menuitem" tabindex="-1" href="http://twitter.com/fat">Action</a></li>
          </ul>
        </li>
      </ul>
    </div><!-- /.nav-collapse -->
  </div><!-- /.container-fluid -->
</nav>

var myApp = angular.module('myApp', ['ui.bootstrap']);

function NavBarCtrl($scope) {
    $scope.isCollapsed = true;
}

Why won’t it collapse? Here’s the JSFiddle.