DOM library declaration is required in tsconfig.json for a server-side application about connect-es

[timostamm]

Hey Petr, @fubhy is on point here.

The best available solution until this is resolved in @types/node appears to be the one noted by @meyfa in DefinitelyTyped/DefinitelyTyped#60924 (comment):

As a workaround, I recommend [...] adding undici as a dev dependency and using the following adapted declaration:

declare global {
  var fetch: typeof import('undici').fetch
}

I'm going to close this issue because there is little we can do on our side, but will pin it for visibility, and hope that it will be helpful for other users. Thank you for raising it.

[fubhy]

This is not just used in browser contexts. Fetch is also available in Node starting in Node v18+. Going forward, the right approach would be to correctly use the right types for the environment that you are targeting with your tsconfig.json. E.g. using @types/node (https://github.com/DefinitelyTyped/DefinitelyTyped) in the types field in tsconfig.json. Sadly, fetch is not included in there yet, hence DOM is your second best option (or using @types/web as a workaround).

See also: DefinitelyTyped/DefinitelyTyped#60924

[xtazz]

@timostamm @fubhy, thanks for your input. I will try the workaround.