Firebase - Read Data

In this chapter, we will show you how to read Firebase data. The following image shows the data we want to read.

We can use the 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.

Example

Let us consider the following example.

var ref = firebase.database().ref();

ref.on("value", function(snapshot) {
   console.log(snapshot.val());
}, function (error) {
   console.log("Error: " + error.code);
});

If we run the following code, our console will show the data.

In our next chapter, we will explain other event types that you can use for reading data.