Is it possible to achieve dynamic updating in Angular without utilizing ng-repeat? (with the use of Firebase)

Is there a way to dynamically update the DOM without utilizing ng-repeat in your template? It appears that when using ng-repeat to load a list of objects, any additions or deletions from the database automatically reflect in the DOM. However, if I simply use $scope outside of an ng-repeat, the updates do not happen dynamically.

I'm working on code that displays the number of users online from Firebase. A console.log statement shows whenever a user logs in, but the scope does not update. Is there a method to refresh this information in the DOM to display the updated count?

Example code provided below:

  firebase.database().ref('presence').on('value', function(snap) {
    console.log("# of online users = " + snap.numChildren());
    $scope.usersOnline = snap.numChildren();
  });

Answer №1

When working with a callback function outside of the Angular framework (I'm assuming you are using Angular 1, correct me if I'm mistaken), it's important to follow these steps to ensure that the UI layer is notified of any updates:

firebase.database().ref('presence').on('value', function(snap) {
  $scope.$evalAsync(function() {
     console.log("# of online users = " + snap.numChildren());
     $scope.usersOnline = snap.numChildren();
  });
});

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