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Andras Schmelczer 2025-08-22 20:06:23 +01:00
parent 063ee2a2c0
commit 26cd95cfda
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1 changed files with 10 additions and 4 deletions
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14
frontend/sync-client/src/utils/create-promise.ts
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@ -1,17 +1,23 @@
type ResolveFunction<T> = undefined extends T
? (value?: T) => unknown
: (value: T) => unknown;
/** /**
* A type-safe utility function to create a Promise with resolve and reject functions. * A type-safe utility function to create a Promise with resolve and reject functions.
* @returns A tuple containing a Promise, a resolve function, and a reject function. * @returns A tuple containing a Promise, a resolve function, and a reject function.
*/ */
export function createPromise<T = unknown>(): [ export function createPromise<T = unknown | undefined>(): [
Promise<T>, Promise<T>,
(value: T) => unknown, ResolveFunction<T>,
(error: unknown) => unknown (error: unknown) => unknown
] { ] {
let resolve: undefined | ((resolved: T) => unknown) = undefined; let resolve: undefined | ResolveFunction<T> = undefined;
let reject: undefined | ((error: unknown) => unknown) = undefined; let reject: undefined | ((error: unknown) => unknown) = undefined;
const creationPromise = new Promise<T>( const creationPromise = new Promise<T>(
(resolve_, reject_) => ((resolve = resolve_), (reject = reject_)) (resolve_, reject_) => (
(resolve = resolve_ as ResolveFunction<T>), (reject = reject_)
)
); );
// eslint-disable-next-line @typescript-eslint/no-non-null-assertion // eslint-disable-next-line @typescript-eslint/no-non-null-assertion