Please make sure you have searched for information in the following guides.

• Search the issues already opened: https://github.com/GoogleCloudPlatform/google-cloud-node/issues
• Search StackOverflow: http://stackoverflow.com/questions/tagged/google-cloud-platform+node.js
• Check our Troubleshooting guide: https://github.com/googleapis/google-cloud-node/blob/main/docs/troubleshooting.md
• Check our FAQ: https://github.com/googleapis/google-cloud-node/blob/main/docs/faq.md
• Check our libraries HOW-TO: https://github.com/googleapis/gax-nodejs/blob/main/client-libraries.md
• Check out our authentication guide: https://github.com/googleapis/google-auth-library-nodejs
• Check out handwritten samples for many of our APIs: https://github.com/GoogleCloudPlatform/nodejs-docs-samples

A screenshot that you have tested with "Try this API".

In a TypeScript file, using:

import { Storage } from '@google-cloud/storage';

will generate the following error with Node.js 25.0.0:

TypeError: Cannot read properties of undefined (reading 'prototype')

Functions correctly in Node.js 24.x

Link to the code that reproduces this issue. A link to a public Github Repository or gist with a minimal reproduction.

https://github.com/googleapis/nodejs-storage

A step-by-step description of how to reproduce the issue, based on the linked reproduction.

See description.

A clear and concise description of what the bug is, and what you expected to happen.

TypeError: Cannot read properties of undefined (reading 'prototype')

A clear and concise description WHY you expect this behavior, i.e., was it a recent change, there is documentation that points to this behavior, etc. **

Node.js 25.x upgrade.