Angular: Empty Fiddle
http://angularjs.org/
by boneskull
HTML
<script src="http://code.angularjs.org/1.1.5/angular.min.js"></script>
<div ng-controller="MyCtrl">
<button ng-click="toggle()">{{myval}}</button>
</div>
JavaScript
var myApp = angular.module('myApp',[]);
function MyCtrl($scope) {
$scope.myval = 'Start';
$scope.toggle = function() {
$scope.myval = $scope.myval === 'Start' ? 'Stop' : 'Start';
};
}