Ah.....you're putting TypeScript in JSDoc annotations.

Which is a lot different than vanilla JSDoc [1].

I understand.

[1] https://jsdoc.app/

JSDoc doesn't have a formal spec. Most modern development on JSDoc syntax happens by the TypeScript team. Every release of TypeScript also includes notes about JSDoc syntax.

Almost any modern IDE is also parsing JSDoc comments through the TypeScript language service. So many people don't realize they are already using TypeScript (hence the name of this post).

I don't think it's particularly controversial to say that the form of JSDoc that the majority of developers are familiar with IS JSDoc. The distinction is more of a historical one than a technical one (since there is no formal JSDoc spec)