[dwattttt]

The type isn't just there to make it easy to understand when you do it, it's for you a year later when you need to make a change further inside a codebase, far from where it's validated. Or for someone else who's never even seen the validation section of code.

I'm hung up on the type system because it's a great way to convey the validity of the data; it follows the data around as it flows through your program.

I don't (yet) Typescript, but jsdoc and linting give me enough type checking for my needs.

[k3vinw]

jsdoc types are better than nothing. You could switch to using Typescript today and it will understand them.

[hdjrudni]

Don't get me wrong, I love TypeScript types. And if I didn't have TypeScript, I'd use jsdoc.

I'm just saying that TypeScript and jsdoc don't actually do any runtime enforcement. It's important that the library does that part, with or without types.