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Firebase Storage in Web Application: storage.useEmulator is not a function

In my local web application development environment the web application is accessing the Firestore emulator correctly, but not the Storage emulator. Instead it accesses the production storage.

I load the module from http://localhost:5000/__/firebase/8.3.0/firebase-storage.js

I have tried this from

var storage =;
storage.useEmulator("localhost", 9199);

But the useEmulator function does not exist. How can this be?


The function storage.useEmulator was introduced in a later version of firebase.