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That shouldn't happen https://github.com/DefinitelyTyped/DefinitelyTyped#i-want-to...

I didn't know about this, thanks.

This is rare (I have never run into it in many years of writing TS code and pulling repos from NPM), and if it does happen you can always ignore the definition and turn it back into a plain JS package.

Not rare. Happens every 12 months or so in my experience as a library maintainer. It really sucks that Typescript, let alone .d.ts files produced by the compiler, don’t follow anything resembling semver.

> newer versions never have breaking changes anyways.

I've also seen changes to the type system that break existing library typings. (e.g. when they started strongly typing generators.)

I suppose this only happens when you're using the more strict compilation settings, but that's a major draw of typescript in the first place.

That's the exact case I was referring to in i) - and what drove me to write this post :)