Cast type to only one property of a deconstructed object in Typescript

Asked Jul 14 '21 at 17:23

Active Jul 14 '21 at 17:23

Viewed 115 times

I have this Next.js method:

export const getServerSideProps: GetServerSideProps = async context => {

  const {query, locale, req} = context
  ...
}

Is there a way I can cast my own specific type to only the query parameter while deconstructing like so? Because by default each property in query...

const {prop1, prop2, prop3} = query

...has a default type of string | string[] which is somewhat too much to handle/override in code.

asked Jul 14 '21 at 17:23

artooras

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Will this work for you ? `const { prop1, prop2, prop3 } = query as Record;` – Amir Saleem Jul 14 '21 at 17:51
or you want a global solution – Amir Saleem Jul 14 '21 at 17:51
I think you can redeclare the namepace you want to override using `declare namespace ` – Amir Saleem Jul 14 '21 at 17:52
Not really... I have an interface for the named query parameters defined that I would like to use. Some parameters are strings, some are arrays, some are objects, etc. – artooras Jul 14 '21 at 17:52
Sorry, I replied before your last comment... How does declare namespace work? Never used it. – artooras Jul 14 '21 at 17:53
check this https://stackoverflow.com/questions/49699703/how-do-i-extend-rather-than-override-an-existing-type-declaration – Amir Saleem Jul 14 '21 at 17:54
check this instead https://stackoverflow.com/questions/12802383/extending-array-in-typescript – Amir Saleem Jul 14 '21 at 17:55
you can redeclare the same namespace again to override the defaults. I am not aware of NextJs TS declaration so don't know its type declarations – Amir Saleem Jul 14 '21 at 17:56
hm... but I don't want to extend the default type, I just want to override the type of the `query` parameter on the `context` object. – artooras Jul 14 '21 at 18:31
@captain-yossarian – Amir Saleem Jul 15 '21 at 09:15

Cast type to only one property of a deconstructed object in Typescript

0 Answers0