Cannot find name 'GlobalFetch despite having proper TS version

Question

I am fresh building a web app repository using React/TypeScript and the app works but deployment fails:

> build:dev
> SNOWPACK_PUBLIC_APP_ENVIRONMENT=dev snowpack build

[@snowpack/plugin-typescript] src/api/runtime.ts(130,24): error TS2304: Cannot find name 'GlobalFetch'.
[@snowpack/plugin-typescript] Error: Command failed with exit code 2: tsc --noEmit
src/api/runtime.ts(130,24): error TS2304: Cannot find name 'GlobalFetch'.

Weird is the project is working on another machine, so it is not a new development, there were no source code change. SO answers on "GlobalFetch" say there was a problem with it in some 3.x version of type script, but I see the version installed has higher one:

version "4.2.3"

Any ideas on where to look for a reason?

Answer 1

The GlobalFetch type was removed from the definitions in TS 3.6.

Your other dev environment probably uses an old version of TS.

You either have to

• downgrade your TS version
• remove the GlobalFetch type in your code base
• recreate the type with: declare type GlobalFetch = WindowOrWorkerGlobalScope