Socket.io: Missing type definitions in Socket.IO 3.x

[renkei]

I've updated my TypeScript project from version 2.x to version 3.0.1 of socket.io. After that I cannot compile my project anymore because no type definitions of cors, cookie and component-emitter are known.

After adding them (@types/cors, @types/cookie, @types/component-emitter) to the devDependencies section of my project it works again, but this is neither documented in the migration guide nor feels it like a good solution to add a 3rdParty component and then to get compiler errors because of missing dependencies.

[darrachequesne]

Hmm... according to this, it seems that the types must actually be included in the dependencies section, and not in the devDependencies. Let's do this!

[renkei]

This solves the issue for missing typings of cors and cookie, but not for component-emitter, used by package socket.io-parser where @types/component-emitter is included in the devDependencies section only. So, even with socket.io 3.0.3 I got a compiler error because of missing @types/component-emitter. I still have to add this to my own devDependencies section, although this is an implementation detail of socket.io that is nowhere documented.

[P4sca1]

@renkei See https://github.com/socketio/socket.io-parser/pull/99

[darrachequesne]

Fixed by https://github.com/socketio/socket.io/commit/118cc686a134c92dcb933c506eab6471a1019829 and https://github.com/socketio/socket.io-parser/commit/4efa005846ae15ecc7fb0a7f27141439113b1179.

Thanks!