/**
 * Check if the browser supports WebAuthn
 *
 * @return {boolean}
 */
export declare function isSupported(): boolean;
/**
 * Check if the browser doesn't support WebAuthn
 */
export declare function isNotSupported(): boolean;
/**
 * Check if the browser doesn't support WebAuthn
 */
export declare function isUnsupported(): boolean;
/**
 * Check if the browser can show an autofill dialog with existing Passkeys.
 *
 * @see https://web.dev/articles/passkey-form-autofill
 */
export declare function isAutofillable(): Promise<boolean>;
/**
 * Check if the browser cannot show an autofill dialog with existing Passkeys.
 *
 * @see https://web.dev/articles/passkey-form-autofill
 */
export declare function isNotAutofillable(): Promise<boolean>;
/**
 * Check if the browser is on device compatible with Touch ID, Face ID, Windows Hello, or others.
 */
export declare function isPlatformAuthenticator(): Promise<boolean>;
/**
 * Check if the browser is not on device compatible with Touch ID, Face ID, Windows Hello, or others.
 */
export declare function isNotPlatformAuthenticator(): Promise<boolean>;