Angularjs Message Binding Doesn't Show Until Second Form Submit

I'm writing my first angularjs app, and it's beginning to make sense. However, I have a sign up form that isn't getting the messages in some cases to alert users to problems. I'm u

Solution 1:

I'm assuming, the Firebase callback does not involve an angular digest cycle.

To handle this, write

if (snapshot.val()) {
    $scope.$apply(function() {
        $scope.authMsg = 'Username exists— did you forget your password?';
    });

A useful reading about the topic: http://jimhoskins.com/2012/12/17/angularjs-and-apply.html