Authentication Event Types
onAuthStateChanged
- The onAuthStateChanged event type is triggered whenever the user’s authentication state changes, such as when the user signs in, signs out or the current user changes.
- This event is useful for managing user sessions and providing personalized user experiences based on their authentication state.
Example: Listening for onAuthStateChanged Changes
firebase.auth().onAuthStateChanged(function(user) {
if (user) {
console.log("User is signed in:", user);
} else {
console.log("User is signed out");
}
});
Output
Executing the above code will continuously listen for changes to the authentication state and log whether the user is signed in or signed out
Firebase Event Types
Firebase provides event types such as value, child_added, onSnapshot, and onAuthStateChanged across its services like Realtime Database, Cloud Firestore and Authentication. These event types enable developers to build real-time applications and trigger actions based on changes in data or authentication state.
In this article, We will learn about these event types are essential for creating dynamic and interactive applications with Firebase in detail.
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