export declare const isResourceTimingAvailable: boolean;
export declare const isPerformanceObserverAvailable: any;
export declare const PerformanceTimingNames: Readonly<{
    CONNECT_END: "connectEnd";
    CONNECT_START: "connectStart";
    DECODED_BODY_SIZE: "decodedBodySize";
    DOM_COMPLETE: "domComplete";
    DOM_CONTENT_LOADED_EVENT_END: "domContentLoadedEventEnd";
    DOM_CONTENT_LOADED_EVENT_START: "domContentLoadedEventStart";
    DOM_INTERACTIVE: "domInteractive";
    DOMAIN_LOOKUP_END: "domainLookupEnd";
    DOMAIN_LOOKUP_START: "domainLookupStart";
    ENCODED_BODY_SIZE: "encodedBodySize";
    FETCH_START: "fetchStart";
    LOAD_EVENT_END: "loadEventEnd";
    LOAD_EVENT_START: "loadEventStart";
    NAVIGATION_START: "navigationStart";
    REDIRECT_END: "redirectEnd";
    REDIRECT_START: "redirectStart";
    REQUEST_START: "requestStart";
    RESPONSE_END: "responseEnd";
    RESPONSE_START: "responseStart";
    SECURE_CONNECTION_START: "secureConnectionStart";
    START_TIME: "startTime";
    UNLOAD_EVENT_END: "unloadEventEnd";
    UNLOAD_EVENT_START: "unloadEventStart";
}>;
export type ObserveResourcePerformanceResult = {
    duration: number;
    resource?: PerformanceResourceTiming | null;
};
type ObserveResourcePerformanceResultCallback = (arg: ObserveResourcePerformanceResult) => any;
type ObserveResourcePerformanceOptions = {
    resourceMatcher: (arg: PerformanceResourceTiming) => boolean;
    maxWaitForResourceMillis: number;
    maxToleranceForResourceTimingsMillis: number;
    onEnd: ObserveResourcePerformanceResultCallback;
};
type PerformanceObservationContoller = {
    start: () => void;
    end: () => void;
    cancel: () => void;
};
export declare function observeResourcePerformance(opts: ObserveResourcePerformanceOptions): PerformanceObservationContoller;
export {};