Typescript was only not worth it when your core framework (e.g. react/vue) wasn't native ts and also didn't have ts support. In my experience, any npm library

Typescript was only not worth it when your core framework (e.g. react/vue) wasn't native ts and also didn't have ts support. In my experience, any npm library I try to use either already has community created types provided, is too simple to really need types/extra docs, or the docs will still be pre-es6 (pre important, pre async/await, etc.) so it's not like it was going to be convenient to learn anyways.