AngularJS Example
by gogirl
HTML
<div ng-app="">
<div ng-controller="Ctrl">
<select ng-model="selection" ng-options="item for item in items">
</select>
<tt>selection={{selection}}</tt>
<hr/>
<div ng-switch on="selection" >
<span ng-switch-when="">This string is empty</span>
<span ng-switch-when='blue' style="color:blue">This string is blue</span>
<span ng-switch-default>This string is not empty</span>
</div>
</div>
</div>
CSS
</style> <!-- Ugly Hack due to jsFiddle issue: http://goo.gl/BUfGZ -->
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.0.2/angular.min.js"></script>
<style>
.ng-invalid { border: 1px solid red; }
JavaScript
//what is an appropriate usage of ng-default?
function Ctrl($scope) {
debugger;
$scope.items = ['','blue', 'not empty'];//use an array
$scope.selection = $scope.items[0];// first
}