Push notifications (expo-notifications) in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of expo-notifications in React Native?

It is a library that helps apps send and receive push notifications easily on both iOS and Android devices.

beginner

Which method is used to get the device's push notification token with expo-notifications?

The method getExpoPushTokenAsync() returns a unique token to send push notifications to that device.

beginner

Why do you need to ask for permissions before sending push notifications?

Because users must allow the app to show notifications. Without permission, notifications won’t appear.

intermediate

What is the role of a notification handler in expo-notifications?

It controls how notifications behave when received, like showing alerts or playing sounds.

intermediate

How can you listen for incoming notifications while the app is running?

By adding a listener with addNotificationReceivedListener to react when notifications arrive.

Which function gets the push notification token in Expo?

A getExpoPushTokenAsync()

B requestPermissionsAsync()

C sendNotificationAsync()

D addNotificationReceivedListener()

getExpoPushTokenAsync() returns the device token needed to send push notifications.

What must you do before showing notifications to the user?

A Restart the app

B Send a test notification

C Request permission from the user

D Clear app cache

Users must grant permission before the app can display notifications.

Which listener lets you react when a notification arrives while the app is open?

A addNotificationResponseReceivedListener

B requestPermissionsAsync

C getExpoPushTokenAsync

D addNotificationReceivedListener

addNotificationReceivedListener triggers when a notification is received in the foreground.

What does the notification handler control?

A The app’s theme colors

B How notifications behave when received

C User login state

D Network requests

The notification handler defines if notifications show alerts, sounds, or badges.

Which platform(s) does expo-notifications support?

A iOS and Android

B Only iOS

C Only Android

D Web browsers

expo-notifications works on both iOS and Android devices.

Explain the steps to set up push notifications using expo-notifications in a React Native app.

Think about permissions, token, handlers, and listeners.

Describe how you would handle a notification when the app is open versus when it is closed.

Consider different app states and listeners.