'firebase.auth is not a function' error after SDK update

Question

I am using the Firebase JS sdk for the web without any problems for a year now. After updating my code from the version 5.3.1 to use the latest 6.5.0 S

Answer 1

As explained in the doc (Tab "From the CDN"), importing firebase-app.js only is not sufficient: you need, in addition, to import all the libraries of the Firebase products you want to use (Firebase Auth, Firestore, etc...).

So, in your case, you should do as follows:

<script src="https://www.gstatic.com/firebasejs/X.Y.Z/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/X.Y.Z/firebase-auth.js"></script>

where X.Y.Z is the version number of the libraries, i.e. 6.6.1 at the time of writing.

Answer 2

Change this:

<script src="https://www.gstatic.com/firebasejs/6.5.0/firebase-app.js"></script>

to this:

<script src="https://www.gstatic.com/firebasejs/6.6.1/firebase.js"></script>