I want to check if a form is valid inside an angular controller. This seems straightforward when using $scope, but I can't get it to work with the 'controller as' syntax.
When I attempt to access form.$valid I get the error message "Cannot read property '$valid' of undefined".
plunkr: http://plnkr.co/edit/w54i1bZVD8UMhxB4L2JX?p=preview
HTML
<div ng-app="demoControllerAs" ng-controller="MainController as main">
<form name="contactForm" novalidate>
<p>
<label>Email</label>
<input type="email" name="email" ng-model="main.email" required />
</p>
<p>
<label>Message</label>
<textarea name="message" ng-model="main.message" required></textarea>
</p>
<input type="submit" value="submit" ng-click="main.submit()" />
</form>
</div>
JS
var app = angular.module('demoControllerAs', []);
app.controller('MainController', [function () {
var main = this;
main.submit = function () {
var isValid = main.contactForm.$valid;
console.log(isValid);
};
}]);