import { CssSelectorGeneratorOptions, CssSelectorMatch, CssSelectorTypes } from "./types.js";
export declare const DEFAULT_OPTIONS: CssSelectorGeneratorOptions;
/**
 * Makes sure the input is converted to a boolean value.
 */
export declare function sanitizeBoolean(input: unknown): boolean;
/**
 * Makes sure returned value is a list containing only valid selector types.
 * @param input
 */
export declare function sanitizeSelectorTypes(input: unknown): CssSelectorTypes;
/**
 * Checks whether provided value is of type RegExp.
 */
export declare function isRegExp(input: unknown): input is RegExp;
/**
 * Checks whether provided value is usable in whitelist or blacklist.
 * @param input
 */
export declare function isCssSelectorMatch(input: unknown): input is CssSelectorMatch;
/**
 * Converts input to a list of valid values for whitelist or blacklist.
 */
export declare function sanitizeCssSelectorMatchList(input: unknown): CssSelectorMatch[];
/**
 * Checks whether provided value is valid Node.
 * Uses nodeType check instead of instanceof to work across iframe boundaries.
 */
export declare function isNode(input: unknown): input is Node;
/**
 * Checks whether provided value is valid ParentNode.
 */
export declare function isParentNode(input: unknown): input is ParentNode;
/**
 * Makes sure that the root node in options is valid.
 */
export declare function sanitizeRoot(input: unknown, element: Element): ParentNode;
/**
 * Makes sure that the output is a number, usable as `maxResults` option in
 * powerset generator.
 */
export declare function sanitizeMaxNumber(input?: unknown): number;
/**
 * Makes sure the options object contains all required keys.
 */
export declare function sanitizeOptions(element: Element, custom_options?: {}): CssSelectorGeneratorOptions;