Usage

const result = (await guard(fetchUsers)()) ?? [];

Installation

CLI

npx atmx add helper guard

Manually

Copy and paste the following method into @/utils/helpers/undefined.ts:

/**
* A helper to try an async function that returns undefined if it
* fails.
*
* @example
* const result = await guard(fetchUsers)() ?? [];
*/
export function guard<TFunction extends () => any>(
func: TFunction,
shouldGuard?: (err: any) => boolean,
): ReturnType<TFunction> extends Promise<any>
? Promise<Awaited<ReturnType<TFunction>> | undefined>
: ReturnType<TFunction> | undefined {
const _guard = (err: any) => {
if (shouldGuard && !shouldGuard(err)) {
  throw err;
}
return undefined as any;
};
try {
const result = func();
return result instanceof Promise ? result.catch(_guard) : result;
} catch (err) {
return _guard(err);
}
}