@worker-tools/typed-event-target/types/index.d.ts

This is the Typed Event Target library you are looking for.

export interface TypedEventListener<E extends Event> {
    (evt: E): void;
}
export interface TypedEventListenerObject<E extends Event> {
    handleEvent(object: E): void;
}
export declare type TypedEventListenerOrEventListenerObject<E extends Event> = TypedEventListener<E> | TypedEventListenerObject<E>;
declare type StringKeyOf<T> = keyof T extends string ? keyof T : never;
export interface TypedEventTarget<EventMap extends Record<K, Event> = Record<string, Event>, K extends string = StringKeyOf<EventMap>> extends EventTarget {
    addEventListener<K extends keyof EventMap>(type: K, listener: TypedEventListenerOrEventListenerObject<EventMap[K]> | null, options?: boolean | AddEventListenerOptions): void;
    addEventListener(type: string, listener: EventListenerOrEventListenerObject | null, options?: boolean | AddEventListenerOptions): void;
    removeEventListener<K extends keyof EventMap>(type: K, listener: TypedEventListenerOrEventListenerObject<EventMap[K]> | null, options?: boolean | EventListenerOptions): void;
    removeEventListener(type: string, listener: EventListenerOrEventListenerObject | null, options?: boolean | EventListenerOptions): void;
}
export declare const TypedEventTarget: {
    prototype: EventTarget;
    new <EventMap extends Record<K, Event> = Record<string, Event>, K extends string = StringKeyOf<EventMap>>(): TypedEventTarget<EventMap, K>;
};
export {};