Angular Firebase get data

How to perform fetch and send with Firestore using ReactJS ?

For reading a data from the Firebase Realtime database, Firebase has two methods on() and once() . on() method to retrieve data. This method is taking the event type as “value” and then retrieves the snapshot of the data. When we add val() method to the snapshot, we will get the JavaScript representation of the data.

How to Save Data to the Firebase Realtime Database in Android?

There are two ways to retrieve data stored in Firestore. Either of these methods can be used with documents, collections of documents, or the results of queries: Call a method to get the data . Set a listener to receive data-change events.