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Discussion on: Why You Should Use Typescript Over Javascript?

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Replies for: Note that you can also use jsdoc for ts-like typing. jsdoc.app/tags-typedef.html VSCode also has this convenient builtin feature that allows you...

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patarapolw profile image
Pacharapol Withayasakpunt •

Yes, I do use JSDoc, along with // @ts-check, if I had to use JavaScript.

However, not only that it is harder to declare complex types, but also that IntelliSense is still less smart, even with ts-check on.

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tqbit profile image
tq-bit •

Your comment got me curious on complex types - I haven't used JSDoc trying to declare such yet. Can you please explain this a bit further?
I couldn't find a lot of good examples in the ts docs, neither on the www.

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patarapolw profile image
Pacharapol Withayasakpunt • • Edited

As far as I know, you can

  • Use /** @type {} */ to specify types for a variable
  • Use /** @type {} */ (x) to force a variable to type
  • Use /** @typedef {} */ to declare a type in advance

But still,

  • I don't know how to declare generics.
  • I don't know how to export types of JSDoc from a file.

BTW, much of typing works inside /** @type {} */'s bracelets. You can even use import().Class and use TypeScript interface syntax inside them.