Firebase - Offline Capabilities

In this chapter, we will show you how to handle the Firebase connection state.

Check Connection

We can check for connection value using the following code.

index.js

var connectedRef = firebase.database().ref(".info/connected");

connectedRef.on("value", function(snap) {
   if (snap.val() === true) {
      alert("connected");
   } else {
      alert("not connected");
   }
});

When we run the app, the pop up will inform us about the connection.

By using the above given function, you can keep a track of the connection state and update your app accordingly.