Can the type be determined based on a payload function?
For example:
export const myFunction = (
findAll: boolean
) => {
const finders: { key: if findAll is true, then VueWrapper<T>[] else VueWrapper<T> } = {}
})
In this case, I aim to alter the finders type to an Array if the findAll condition is true
Using Conditional Types makes it achievable.
type FindOrFindAllResult<TElement, TFindAll extends boolean>
= TFindAll extends true
? TElement[]
: TElement
const customFunction = <T, TFindAll extends boolean = boolean>(
findAll: TFindAll
):FindOrFindAllResult<VueWrapper<T>, TFindAll> => {
if (findAll) {
return [] // implement your function that returns an array here
}
else {
return null // implement your function that returns a single element here
}
}
const arrayOutput = customFunction(true) // arrayOutput has type VueWrapper<T>[]
const elementOutput = customFunction(false) // elementOutput has type VueWrapper<T>
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