[mhagemeister]

Author here. Thanks for sharing that feedback. I think I missed the mark by being so used to working with runtimes that natively run TS files, that I forgot that this is not the default for everyone. The article was mostly written from that perspective.

For Node users the isolated declaration feature won't do much other than speed up the creation of the .d.ts files a little. For runtimes that can run TS natively like Deno (disclaimer: I work for Deno) the benefit is much more apparent as you always want the original TS sources, but can generate .d.ts files on the fly for faster type checking.

EDIT: Formatting