Expo Android : Property 'TransformStream' doesn't exist

[fab-uleuh]

Description

I follow the documentation : https://sdk.vercel.ai/docs/getting-started/expo

It works on the web but it don't work on android :

ERROR ReferenceError: Property 'TransformStream' doesn't exist, js engine: hermes [Component Stack]

Code example

No response

AI provider

@ai-sdk/openai: 1.0.8

Additional context

No response

[JimmyLv]

same here

[lgrammel]

TransformStream is a JS standard feature. This seems like a gap in to Expo to me. Can you file a bug w/ Expo? Which Expo version are you using?

[lgrammel]

cc @nicoalbanese

[JacksonMalloy]

Also running into this issue. Was trying to test the useObject hook and was seeing this on my iOS simulator.

[psx2]

same on ios

edit: updating to expo 52 fixed this.

[lgrammel]

It means that TransformStream is not available in the platform that you are using. It has been web standard for a while: https://developer.mozilla.org/en-US/docs/Web/API/TransformStream

Can you try polyfilling TransformStream?

[lgrammel]

We have a new guide for polyfiling, can you give it a try? https://sdk.vercel.ai/docs/getting-started/expo#polyfills