AngularJS 'controller as' and form.$valid
You could do as @ons-jjss suggested but if you prefer not to inject $scope
into you controller, then just change your form
name as
<form name="main.contactForm" novalidate>
and it'll work like a charm.
You need to use in this way: $scope.contactForm.$valid
EDIT
To work the above syntax, $scope needs to be inhjected in controller.
app.controller('MainController', function($scope) { //code }
You need to use main.contactForm
in form name attribute then it's solved.See this
`http://plnkr.co/edit/us8MKU3LZ7pnLV66xIrv?p=preview`