import { SyntheticEvent } from 'react';

/**
 * Join modifiers with origin class
 * @returns `"origin-class origin-class--modifier"`
 */
export declare function classWithModifiers(originClass: string, ...modifiers: Array<string | number | false | null | undefined>): string;
export declare function serialize<T = unknown>(value?: T | null): string;
/**
 * Stops propagation from container
 * @param callback any function
 * @returns mouse event handler
 */
export declare function stopPropagation(callback?: (() => void) | null): ({ target, currentTarget }: Event | SyntheticEvent) => void;
/**
 * Helps prevent error logs blowing up as a result of expecting an error to be thrown,
 * when using a library (such as enzyme)
 *
 * @param fn Function that you would normally pass to `expect(func).toThrow()`
 */
export declare function expectToThrow(fn: () => unknown, error?: Parameters<jest.Matchers["toThrow"]>[0]): void;
/**
 * 53-bit hash function.
 *
 * https://stackoverflow.com/a/52171480/12468111
 */
export declare function cyrb53(string: string, seed?: number): number;
export declare function elementClick(element?: Element | null): boolean;