29 lines
795 B
TypeScript
29 lines
795 B
TypeScript
// The "container" types
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type Success<T> = { data: T; error: null };
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type Failure<E> = { data: null; error: E };
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export type Result<T, E = Error> = Success<T> | Failure<E>;
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/**
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* A universal tryCatch wrapper that:
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* - Never throws
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* - Always resolves to Result<T,E>
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* - Allows optional error mapping function for strong typing
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*/
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export async function tryCatch<T, E = Error>(
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promise: Promise<T>,
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onError?: (error: unknown) => E
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): Promise<Result<T, E>> {
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try {
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const data = await promise;
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return { data, error: null };
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} catch (err: unknown) {
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const error = onError
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? onError(err)
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: err instanceof Error
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? (err as E)
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: (new Error(String(err)) as E);
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return { data: null, error };
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}
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}
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