chore(update-plugins): Mon Sep 2 08:05:12 UTC 2024

Author: nativescript-oss

content/plugins/firebase-database.md

@@ -169,15 +169,14 @@ If you are listening to a node with many children, only listening to data you ca
 ```ts
 import { firebase } from '@nativescript/firebase-core'
 
-const onChildAdd = firebase()
-  .database()
-  .ref('/users')
-  .on('child_added', (snapshot) => {
-    console.log('A new node has been added', snapshot.val())
-  })
+const ref = firebase().database().ref('/users')
+
+const onChildAdd = ref.on('child_added', (snapshot) => {
+  console.log('A new node has been added', snapshot.val())
+})
 
 // Stop listening for updates when no longer required
-firebase().database().ref('/users').off('child_added', onChildAdd)
+ref.off('child_added', onChildAdd)
 ```
 
 ### Remove a reference event listener
@@ -187,17 +186,22 @@ To unsubscribe from an event, call the `off` method on the reference passing it
 ```ts
 import { firebase } from '@nativescript/firebase-core'
 
-const onValueChange = firebase()
-  .database()
-  .ref(`/users/${userId}`)
-  .on('value', (snapshot) => {
-    console.log('User data: ', snapshot.val())
-  })
+const ref = firebase().database().ref(`/users/${userId}`)
+
+const onValueChange = ref.on('value', (snapshot) => {
+  console.log('User data: ', snapshot.val())
+})
 
 // Stop listening for updates when no longer required
-firebase().database().ref(`/users/${userId}`).off('value', onValueChange)
+ref.off('value', onValueChange)
 ```
 
+:::tip Note
+
+The `off` method requires the same `ref` as specified on the corresponding `on` method. The event handler specified in the `on` method must be unique. If a common event handler is used for multiple events, an anonymous function can be used to invoke the common handler.
+
+:::
+
 ### Data querying
 
 Realtime Database provides support for basic querying of your data. When a reference node contains children, you can both order & limit the returned results.