export declare const is_plain_object: (val: unknown) => val is Record<string, unknown>;
export declare const clamp01: (value: number) => number;
export declare const escape_html: (unsafe_string: string) => string;
export declare const escape_csv_field: (value: number | string | null | undefined) => string;
export declare const csv_line: (cells: readonly (number | string | null | undefined)[]) => string;
export declare function rows_to_csv(rows: Record<string, number | string | null>[]): string;
export declare const format_bytes: (bytes?: number) => string;
export declare const normalize_unicode_minus: (value: string) => string;
export declare const normalize_scientific_notation: (value: string) => string;
export declare const parse_num_token: (token: string) => number;
export declare const parse_leading_num: (line: string) => number;
export declare const to_error: (value: unknown) => Error;
export declare function make_change_detector(): (value: unknown) => boolean;
export declare function decode_url_safe_base64(encoded: string): string | undefined;
type KeydownHandler = (event: KeyboardEvent) => boolean;
export declare const handle_and_prevent: (handle: KeydownHandler) => (event: KeyboardEvent) => void;
export {};