import { Configuration, ResourceKind } from '@keitoaino/datadog-browser-core';
import { PerformanceResourceDetails } from './rum';
export declare const FAKE_INITIAL_DOCUMENT = "initial_document";
export declare function computeResourceKind(timing: PerformanceResourceTiming): ResourceKind | ResourceKind.OTHER;
export declare function computePerformanceResourceDuration(entry: PerformanceResourceTiming): number;
export declare function computePerformanceResourceDetails(entry: PerformanceResourceTiming): PerformanceResourceDetails | undefined;
export declare function computeSize(entry: PerformanceResourceTiming): number | undefined;
export declare function isValidResource(url: string, configuration: Configuration): boolean | "";