Detect unsaved data using angularjs

Question

I\'m a newbie to AngularJs, so this might be trivial. Are there any inbuilt AngularJs directive to detect unsaved data in a form. If not then how to go about wr

Answer 1

This is what I did in my Controller.

When I get the form data for modification, first I save its string representation to a scope variable like this:

$scope.originalData = JSON.stringify($scope.data);

Then I create a state change listener:

 var $locationChangeStartUnbind = $scope.$on('$stateChangeStart', function (event, toState, toParams, fromState, fromParams) {
    if ($scope.originalData !== JSON.stringify($scope.data)) {
        //Show alert and prevent state change
    } else {
        //DO NOTHING THERE IS NO CHANGES IN THE FORM
    }
});

Then I clear the listener on scope destroy:

$scope.$on('$destroy', function () {
    window.onbeforeunload = null;
    $locationChangeStartUnbind();
});

Hope this helps.