import { ComplexAttributeConverter } from "lit";
import { Tag } from "../models/tag";
import { EnumValue } from "./types/advancedTypes";
declare const converterNoProvidedFallback: unique symbol;
export declare const booleanConverter: (value: string | null) => boolean;
/**
 * A Lit attribute converter for optional numeric properties.
 *
 * - `null` (attribute absent) → `undefined`
 * - `""` (empty string attribute) or `"null"` (string null from DOM serialization) → `null`
 * - Valid numeric string → `number`
 * - Invalid non-empty string → throws
 *
 * `toAttribute` semantics:
 * - `undefined` → removes the attribute entirely (returns `null` to Lit)
 * - `null` → sets attribute to `""` (empty string)
 * - `number` → sets attribute to the numeric string
 */
export declare const nullableNumberConverter: ComplexAttributeConverter<number | null | undefined>;
export declare const arrayConverter: <T = unknown>(value: string | null | T[]) => T[];
export declare const tagArrayConverter: (value: string | null) => Tag[];
export declare const tagConverter: (value: string | null) => Tag | null;
/**
 * this callback allows the user to define a callback in the attribute
 *
 * @param value - the value of the attribute as a string or a function
 *
 * @example
 * ```html
 * <oe-spectrogram get-page="() => console.log('do something')">
 * </oe-spectrogram>
 * ```
 */
export declare const callbackConverter: <T>(value: string | null | ((...params: any[]) => T)) => any;
export declare const enumConverter: <T extends Readonly<{
    [key: number]: string | number;
}>>(enumValues: T, fallbackValue?: typeof converterNoProvidedFallback | EnumValue<T>) => (value: string | null) => EnumValue<T> | undefined;
export {};