export type AgEngine = 'chromium' | 'webkit' | 'gecko' | 'unknown';
interface NavigatorLike {
    userAgent?: string;
    userAgentData?: {
        brands?: readonly {
            brand: string;
            version?: string;
        }[];
    } | null;
    deviceMemory?: number;
    connection?: {
        saveData?: boolean;
    } | null;
}
export declare const detectEngine: (nav: NavigatorLike) => AgEngine;
export interface CapabilityInput {
    saveData?: boolean;
    deviceMemory?: number | null;
}
export declare const detectCapability: (nav: NavigatorLike) => CapabilityInput;
export {};
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