Angular: Empty Fiddle
http://angularjs.org/
by Umayr Shahid
HTML
<script src="http://code.angularjs.org/angular-1.0.1.js"></script>
<div ng-controller="MyCtrl">
<input type="text" ng-model="foo" placeholder="Enter something" />
<input type="button" ng-click="doSomething()" value="Send" ng-disabled="foo == null" />
</div>
JavaScript
var myApp = angular.module('myApp', []);
function MyCtrl($scope) {
$scope.foo = null;
$scope.doSomething = function () {
alert("Hello, " + $scope.foo);
}
}