/**
 * Configures a function to run after this signal is aborted. This always run in its own microtask
 * (either as an event handler, or immediately via {@link Promise.resolve}).
 *
 * Returns a method which can be used to remove this handler. Returns `true` if it had not yet been
 * run.
 */
export declare function afterSignal(signal: AbortSignal, fn: () => any): () => boolean;
/**
 * Returns a {@link Promise} for the abort of the passed {@link AbortSignal}. Resolves with void/
 * `undefined` when done, rather than the `reason` property.
 */
export declare function promiseVoidForSignal(signal: AbortSignal): Promise<void>;
/**
 * Returns a {@link Promise} for the abort of the passed {@link AbortSignal}. This may be already
 * resolved/rejected if the signal is already aborted, rather than running in a microtask.
 *
 * By default, this rejects with the signal's `reason`. Pass a second argument (even `null` or
 * `undefined`) to resolve with this value, instead (e.g., `Promise.reject(...)`).
 */
export declare function promiseForSignal<T = never>(signal: AbortSignal, resolveWith?: Promise<T> | T): Promise<T>;
/**
 * Wraps {@link AbortSignal.timeout} to deal with Chrome's "TimeoutError" issue (before Chrome 123, it reported "AbortError").
 */
export declare function abortSignalTimeout(timeout: number): AbortSignal;
/**
 * Returns a new {@link AbortSignal} which aborts on the next tick.
 *
 * Aborts with "TimeoutError", just like {@link AbortSignal.timeout}.
 */
export declare function tickAbortSignal(): AbortSignal;
/**
 * Returns a new {@link AbortSignal} that can be individually aborted, but which is also tied to
 * the lifetimes of the passed signals. If any passed signals are aborted, the derived symbol also
 * aborts.
 *
 * If any passed signal is already aborted, returns one of them directly (not derived), with a no-op
 * abort function.
 *
 * If no signals are passed, acts as a pure convenience over creating a proper
 * {@link AbortController}, and the result can be destructured.
 */
export declare function derivedSignal(...raw: (AbortSignal | undefined)[]): {
    signal: AbortSignal;
    abort: (reason?: any) => void;
};
/**
 * An already aborted signal.
 */
export declare const abortedSignal: AbortSignal;
/**
 * A never aborted signal.
 */
export declare const neverAbortedSignal: AbortSignal;
/**
 * A TODO signal, used as a placeholder until you can find a better one.
 *
 * This is the same as {@link neverAbortedSignal}.
 */
export declare const todoSignal: AbortSignal;