JSDoc in TS and JS

Two days ago, I wrote a post about JSDoc.
The post was about using JSDoc for type checking, and it received over 60 comments, including my own replies.

Throw away the "Script" from "Type""Script".

Yeom suyun Sep 16

#typescript #javascript #webdev #discuss

In TypeScript, JSDoc is a pure comment.
Although it provides some information when we hover over the code, it does not support type checking at all.
But it's different in JavaScript.

By adding a few settings to tsconfig.json, TypeScript can read JSDoc in JavaScript and support the same level of type checking as TypeScript.
This is in stark contrast to the incompetent JSDoc of TypeScript.
Also, even in cases where JSDoc is written but not used with TypeScript, such as in an eslint project, JSDoc is simply a comment.
I agree to some extent that JSDoc can be aesthetically horrible, and it is hard to argue against that.
However, I hope that the misunderstanding that JSDoc does not support adequate type checking will be cleared up, and I will leave an example below of how TypeScript and JSDoc can be used to perform the same type checking.

Thank you.

TypeScript DeepReadonly
JSDoc DeepReadonly