import { IPerformanceClient, Logger, ProtocolMode } from "@azure/msal-common/browser";
/**
 * Returns true when the supplied user agent is using Safari
 *
 * @internal
 */
export declare function isSafari(userAgent?: string): boolean;
/**
 * Returns true when EAR should be used for the current request.
 *
 * Safari cannot complete EAR's cross-origin form POST, so requests configured
 * for EAR transparently use authorization code flow instead.
 *
 * @internal
 */
export declare function shouldUseEar(protocolMode: ProtocolMode, logger: Logger, performanceClient: IPerformanceClient, correlationId: string, userAgent?: string): boolean;
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