/**
 * 这是一些关于 EventTarget 的辅助函数
 */
import "./_dnt.polyfills.js";
type GetEventTargetEventMap<T> = T extends EventTarget ? GetAddEventListenerEventMap<T["addEventListener"]> : object;
type GetAddEventListenerEventMap<F> = F extends (type: infer K, listener: (this: any, ev: infer E) => any, options?: any) => any ? {
    [eventname in K & string]: E;
} : never;
/**
 * 一个更加易用的 eventTarget.addEventListener 附加监听函数，返回一个 off 函数，用于 removeEventListener 移除监听
 * @example
 * ```ts
 * event_target_on(abort_signal, 'abort', ()=>{})
 * ```
 */
export declare const event_target_on: <T extends EventTarget, EM extends GetEventTargetEventMap<T> = GetEventTargetEventMap<T>, K extends keyof EM = keyof EM, EV extends EM[K] = EM[K]>(target: T, type: K, handler: (ev: EV) => void, options?: boolean | AddEventListenerOptions) => (() => void);
export {};
//# sourceMappingURL=event_target.d.ts.map