Change button color after click in Angularjs

Answer 1

The probably best way is to bind the button style to the variable like this:

    {{buttonText}}

and define buttonStyle and buttonText in your scope

$scope.buttonText = "Start";
$scope.buttonStyle="button-calm";

$scope.start = function(){
    $scope.buttonText = "Clicked!";
    $scope.buttonStyle="button-assertive";
}