/**
 * This is a simpler version of `Record<T, U>` which do not rely
 * on index type checks to determine whether a type is an object
 * or not. Unlike the `object` type, this has an additional checks
 * to exclude `Array<T>`, and are intended to be used in an `extends` clause.
 */
type AnyRecord<T> = any[] extends T ? never : object;
/**
 *
 * @see https://github.com/developit/mitt
 * Duplicate implementation of mitt. Ported to wpe-lite-packages
 * for internal usage and internal modification.
 *
 * The MIT License (MIT)
 * Copyright (c) 2021 Jason Miller
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */
export type Handler<T = unknown> = (event: T) => void;
export type WildcardHandler<T = Record<string, unknown>> = (type: keyof T, event: T[keyof T]) => void;
export type EventHandlerList<T = unknown> = Array<Handler<T>>;
export type WildCardEventHandlerList<T = Record<string, unknown>> = Array<WildcardHandler<T>>;
export type EventHandlerMap<Events extends AnyRecord<Events>> = Map<keyof Events | '*', EventHandlerList<Events[keyof Events]> | WildCardEventHandlerList<Events>>;
export interface Emitter<Events extends AnyRecord<Events>> {
    all: EventHandlerMap<Events>;
    on<Key extends keyof Events>(type: Key, handler: Handler<Events[Key]>): void;
    on(type: '*', handler: WildcardHandler<Events>): void;
    off<Key extends keyof Events>(type: Key, handler?: Handler<Events[Key]>): void;
    off(type: '*', handler: WildcardHandler<Events>): void;
    emit<Key extends keyof Events>(type: Key, event: Events[Key]): void;
    emit<Key extends keyof Events>(type: undefined extends Events[Key] ? Key : never): void;
}
declare function mitt<Events extends AnyRecord<Events>>(all?: EventHandlerMap<Events>): Emitter<Events>;
export default mitt;