Is there a way to determine the type of an exported union type by extracting it from an array, as illustrated in the example above? How can this be achieved without directly referencing the non-exported Type itself?
interface CurrentType {
a: string;
b: number;
}
type ExportedType = CurrentType | CurrentType[]
type DesiredType = CurrentType
// How do I access DesiredType based on CurrentType?
Ensure that arrays of type unknown are not included in the union
type ModifiedType = Exclude<OriginalType, Array<unknown>>
If you need to create a tool that can process a specific data type and extract information from each element in its array, consider building a utility function:
type ExtractedElementOrType<T> = T extends readonly any[] ? T[number] : T;
This approach is versatile and can handle unions of various base types:
type AnotherCustomType = number | string[];
type Unified = ExtractedElementOrType<AnotherCustomType>;
// ^? string | number
When applied to your scenario, it simplifies down to the desired outcome for your target type:
type CurrentType = ExtractedElementOrType<YourCustomType>;
// ^? IntendedResult
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