Angular.js page failing to reflect changes following Firebase request completion

myApp.controller('RegistrationController', ['$scope',
  function($scope) {
    var auth = firebase.database().ref();
    // console.log("auth::"+auth);

    $scope.login = function() {
      $scope.message = "Welcome " + $scope.user.email;
    }; //login


    $scope.register = function() {    
        console.log($scope.user.email);
        console.log($scope.user.password);
        console.log("jdxnx::" + auth);
        firebase.auth().createUserWithEmailAndPassword($scope.user.email, $scope.user.password).then(function() {
            $scope.message = "Hi" + $scope.user.email + " you have registered"
        }).catch(function(error) {
            $scope.message = error.message;
            console.log($scope.message);
        }); // //createUser
    }; // register
  }
]); // Controller

When I submit my registration details, the register function is triggered. However, the issue arises where the event exits the

firebase.auth().createUserWithEmailAndPassword
before receiving a response, resulting in the {{message}} value remaining blank on the HTML page. This happens because the event returns to the page before the process completes. I would like the event to wait until a response is received from
firebase.auth().createUserWithEmailAndPassword($scope.user.email,$scope.user.password)
.

Please note that I am working with Firebase version 3.x.x.

Answer №1

firebase.auth().createUserWithEmailAndPassword
is an asynchronous function that is not integrated with Angular.js. As a result, Angular.js will not recognize any changes made by its callback to $scope, and the page will not be updated. To resolve this, make sure to include $scope.apply() after the callback finishes.

firebase.auth().createUserWithEmailAndPassword($scope.user.email, $scope.user.password).then(function() {
    $scope.message = "Hi" + $scope.user.email + " you have registered"
    $scope.apply();
  }).catch(function(error) {
    $scope.message = error.message;
    console.log($scope.message);
    $scope.apply();
  });

Here are some other recommendations:

  • Check out the AngularFire project, which manages triggering Angular.js after Firebase operations.
  • The approach of using standalone controllers and $scope in Angular.js is outdated. Consider exploring Controller-As syntax (Angular.js 1.3+) or components (Angular.js 1.5+).

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