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Expo Push Notifications is a service provided by Expo that allows developers to send notifications to users of their applications. It is part of the Expo ecosystem, which is designed to streamline the development process for React Native applications. The purpose of Expo Push is to facilitate communication between the app and its users, keeping them engaged and informed.
When using Expo Push Notifications, you might encounter an error labeled as InvalidBadge
. This error typically manifests when attempting to send a push notification with an invalid badge number. The badge number is used to display a count on the app icon, often indicating unread messages or notifications.
The InvalidBadge
error occurs when the badge number specified in the notification payload is not a valid non-negative integer. This can happen if the badge number is negative, not an integer, or missing altogether. The error prevents the notification from being delivered correctly to the end user.
To fix the InvalidBadge
error, follow these steps:
Ensure that the badge number in your notification payload is a non-negative integer. For example, if you are using a JSON payload, it should look like this:
{
"to": "ExponentPushToken[xxxxxxxxxxxxxxxxxxxxxx]",
"sound": "default",
"body": "You have a new message!",
"badge": 1
}
Review your code to ensure that the badge number is being set correctly. If you are dynamically generating the badge number, make sure it is always a non-negative integer. Here is an example in JavaScript:
let badgeNumber = getUnreadMessagesCount(); // Ensure this returns a non-negative integer
if (badgeNumber < 0) {
badgeNumber = 0;
}
After making the necessary changes, test your push notifications to ensure they are being delivered correctly. You can use tools like Expo's Notification Tool to send test notifications and verify the badge number.
For more information on handling push notifications with Expo, you can refer to the Expo Push Notifications Documentation. Additionally, the Expo Notifications API provides detailed guidance on using notifications in your app.
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