5.40 breaks type of webpack-dev-server

Bug report

What is the current behavior?

If the current behavior is a bug, please provide the steps to reproduce.

1. install webpack and @types/webpack-dev-server
2. create a variable of type Configuration fromwebpack
3. Try to access its devServer property

What is the expected behavior?

For webpack 3.38.1, this works

Other relevant information: webpack version: 5.40.0 Node.js version: v16.3.0 Operating System: macOS 11.4 Additional tools: TypeScript 4.3.2 and @types/webpack-dev-server@3.11.1, @types/webpack-dev-server@3.11.4 also reproduces this issue

[sokra]

@types/webpack-dev-server extends the webpack typings with the devServer property:

https://github.com/DefinitelyTyped/DefinitelyTyped/blob/415b6859c78cc7fe694fb12a10ea88f1fadfe958/types/webpack-dev-server/index.d.ts#L347-L355

For this to work webpack must not provide a devServer property in Configuration.

This seems fine and nothing has changed between these version.

• Make sure you don’t have @types/webpack installed (yarn why/npm ls @types/webpack)
• Make sure you don’t have webpack installed below @types/webpack-dev-server (yarn why/npm ls webpack)
• Make sure you don’t have multiple versions of webpack or @types/webpack-dev-server installed

[webpack-bot]

Issue was closed because of inactivity.

If you think this is still a valid issue, please file a new issue with additional information.