export declare function isNull(val: unknown): boolean;
export declare function isUndefined(val: unknown): boolean;
export declare function isNullOrUndefined(val: unknown): boolean;
/**
 * 安全执行 JSON.parse
 * @param data
 * @returns
 */
export declare function safelyParse(data: string): unknown | Array<any> | Record<string, any>;
export declare function convertUint8ArrayToNumber(value: Uint8Array): number;