Unit_AI/node_modules/@kwsites/promise-deferred/dist/index.d.ts
2024-06-01 16:24:36 -04:00

49 lines
1.6 KiB
TypeScript

/**
* The `DeferredPromise` has a `promise` property in an initially pending state,
* that will be resolved when the `done` method is called or rejected when the
* `fail` method is called.
*/
export interface DeferredPromise<RESOLVES, REJECTS extends Error = Error> {
done(result: RESOLVES): void;
fail(error: REJECTS): void;
readonly status: DeferredPromiseStatus;
readonly fulfilled: boolean;
promise: Promise<RESOLVES>;
}
/**
* The three states the DeferredPromise can be in - initially pending then either
* resolved or rejected when it is fulfilled.
*
* ```typescript
import {createDeferred, DeferredPromiseStatus} from '@kwsites/promise-deferred`;
const pending: DeferredPromiseStatus = 'pending';
expect(createDeferred()).toHaveProperty('status', pending);
```
*/
export declare type DeferredPromiseStatus = 'pending' | 'resolved' | 'rejected';
/**
* Creates a new `DeferredPromise`
*
* ```typescript
import {deferred} from '@kwsites/promise-deferred`;
```
*/
export declare function deferred<T extends any = void, E extends Error = Error>(): DeferredPromise<T, E>;
/**
* Alias of the exported `deferred` function, to help consumers wanting to use `deferred` as the
* local variable name rather than the factory import name, without needing to rename on import.
*
* ```typescript
import {createDeferred} from '@kwsites/promise-deferred`;
```
*/
export declare const createDeferred: typeof deferred;
/**
* Default export allows use as:
*
* ```typescript
import deferred from '@kwsites/promise-deferred`;
```
*/
export default deferred;