Issue with TypeScript when using destructuring on an object

When attempting to destructure data from an object, I encountered the error message 

Property XXXX does not exist on type unknown
. This issue arose while using React Router to retrieve data.

  let {decoded, reasonTypes, submissionDetails} = useRouteLoaderData('root')

The code snippet above triggers the error, whereas the following code works without any issues.

  let data = useRouteLoaderData('root')

The properties decoded, reasonTypes, and submissionDetails all exist within the data object. How should I go about resolving this error?

reactjstypescript

Answer №1

An error is displayed because the data returned by the useRouteLoaderData('root') function may not include the specific data you are trying to destructure. In such cases, it is necessary to use assertions.

For example:

useLoaderData('root') as [specify the type of object that will be returned];

For more information, visit this link

Answer №2

Before anything else, if you're looking for a fully type-safe hook, be sure to check out the conversation about it here

If you're in search of a time-saving trick, give this a shot:

const result = useCustomHook<any>('example')

OR
const result = useCustomHook('example') as any

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