Firebase - Write Data

In this chapter, we will show you how to save your data to Firebase.


The set method will write or replace data on a specified path. Let us create a reference to the player’s collection and set two players.

var playersRef = firebase.database().ref("players/");

playersRef.set ({
   John: {
      number: 1,
      age: 30
   Amanda: {
      number: 2,
      age: 20

We will see the following result.

Firebase Write Data Set


We can update the Firebase data in a similar fashion. Notice how we are using the players/john path.

var johnRef = firebase.database().ref("players/John");

johnRef.update ({
   "number": 10

When we refresh our app, we can see that the Firebase data is updating.

Firebase Write Data Update