import type { ComponentClass } from 'preact';
export declare const noop: (...args: unknown[]) => unknown;
export declare function isDirectOrDeepEqual(a: any, b: any): boolean;
export declare function isEmptyObject(obj?: object): obj is Record<string, never>;
export declare function isSdkVersionGt(major: number, minor: number): boolean;
export declare function pick<T extends object, K extends keyof T>(obj: T, keys: Iterable<K>): Pick<T, K>;
export declare function maybePromise<T>(value: unknown): value is Promise<T>;
export declare function getDisplayName(type: ComponentClass): string;
export declare function hook<T, K extends keyof T>(object: T, key: K, fn: Required<T>[K] extends (...args: infer P) => infer Q ? ((old?: T[K], ...args: P) => Q) : never): void;
/**
 * Runs `fn` with Preact's after-paint scheduler switched to synchronous.
 *
 * Preact 11 defers passive-effect cleanups of unmounted components to that
 * flush. Page destroy is the one path with no later turn to run them in:
 * `callDestroyLifetimeFun` returns and native tears the runtime down, so a
 * deferred cleanup would never run at all.
 */
export declare function withSyncEffectFlush<T>(fn: () => T): T;
export declare const lynxQueueMicrotask: typeof lynx.queueMicrotask;