Firebase StsTokenManager return undefined - Javascript

Introduction

In this topic, we will discuss the issue where the firebase.stsTokenManager returns undefined in JavaScript. Firebase Authentication provides a built-in feature to manage user authentication tokens using the stsTokenManager property. However, sometimes this property may return undefined, causing unexpected behavior in your application.

This guide will explain the possible causes of this issue and provide solutions to fix it.

Possible Causes

There are a few possible reasons why the firebase.stsTokenManager property returns undefined:

1. User is not authenticated: If the user is not authenticated or the authentication token has expired, the stsTokenManager property may return undefined. Ensure that the user is properly authenticated before accessing this property.

2. Incorrect usage: Make sure you are using the stsTokenManager property correctly. It is only available on user objects obtained through Firebase Authentication methods such as firebase.auth().currentUser or firebase.auth().getUser(uid).

3. SDK version compatibility: It is possible that the stsTokenManager property is not available in the version of the Firebase SDK you are using. Check the Firebase documentation and make sure you are using a version that supports this feature.

Solutions

Here are some possible solutions to fix the issue:

1. Verify user authentication: Before accessing the stsTokenManager property, ensure that the user is properly authenticated. You can use the firebase.auth().currentUser property to check if the user is authenticated.

const user = firebase.auth().currentUser;
if (user) {
  // User is authenticated, proceed
} else {
  // User is not authenticated, handle accordingly
}

2. Check asynchronous operations: If you are performing asynchronous operations such as signing in or refreshing tokens, make sure to wait for these operations to complete before accessing the stsTokenManager property. You can use async/await or promises to handle asynchronous code flow.

3. Upgrade Firebase SDK: If you are using an older version of the Firebase SDK, consider upgrading to the latest version. Check the Firebase documentation for the supported features and compatibility of the SDK versions.

Conclusion

In this guide, we have discussed the issue where the firebase.stsTokenManager property returns undefined in JavaScript. We explained the possible causes of this issue and provided solutions to fix it. Make sure to follow the recommended solutions to ensure proper usage of the stsTokenManager property in Firebase Authentication.