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1export declare let optionsSupported: boolean;
2export declare let onceSupported: boolean;
3export declare type EventHandler<K extends keyof HTMLElementEventMap> = (this: HTMLElement, event: HTMLElementEventMap[K]) => any;
4export declare type TaggedEventHandler<K extends keyof HTMLElementEventMap> = EventHandler<K> & {
5 __once?: EventHandler<K>;
6};
7/**
8 * An `addEventListener` ponyfill, supports the `once` option
9 *
10 * @param node the element
11 * @param eventName the event name
12 * @param handle the handler
13 * @param options event options
14 */
15declare function addEventListener<K extends keyof HTMLElementEventMap>(node: HTMLElement, eventName: K, handler: TaggedEventHandler<K>, options?: boolean | AddEventListenerOptions): void;
16export default addEventListener;