/**
 * web-vitals 5.1.0 switched listeners to be added on the window rather than the document.
 * Instead of having to check for window/document every time we add a listener, we can use this function.
 */
export declare function addPageListener(type: string, listener: EventListener, options?: boolean | AddEventListenerOptions): void;
/**
 * web-vitals 5.1.0 switched listeners to be removed from the window rather than the document.
 * Instead of having to check for window/document every time we remove a listener, we can use this function.
 */
export declare function removePageListener(type: string, listener: EventListener, options?: boolean | AddEventListenerOptions): void;
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