type PerformanceEntryMap = {
    longtask: PerformanceLongTaskTiming;
    element: PerformanceElementTiming;
    event: PerformanceEventTiming;
    "first-input": PerformanceEventTiming;
    "largest-contentful-paint": LargestContentfulPaint;
    "layout-shift": LayoutShift;
    "long-animation-frame": PerformanceLongAnimationFrameTiming;
    navigation: PerformanceNavigationTiming;
    paint: PerformancePaintTiming;
};
export declare const ALL_ENTRIES: PerformanceEntry[];
export declare function observe<K extends keyof PerformanceEntryMap>(type: K, callback: (entry: PerformanceEntryMap[K]) => void, options?: PerformanceObserverInit): PerformanceObserver | undefined;
export declare function getEntries<K extends keyof PerformanceEntryMap>(type: K): Array<PerformanceEntryMap[K]>;
export declare function addEntry(entry: PerformanceEntry): void;
export declare function clearEntries(): void;
export {};