/**
 * Replace tab characters with spaces aligned to tab stops.
 */
export declare function expandTabs(str: string, tabSize?: number): string;
/**
 * Get the visual display width of a string.
 * Handles CJK characters (width 2), emoji, ANSI escape codes, tabs, etc.
 */
export declare function visualWidth(str: string): number;
/**
 * Pad a string on the right to reach a target visual width.
 * Unlike String.padEnd, this accounts for wide characters.
 */
export declare function visualPadEnd(str: string, targetWidth: number, fillChar?: string): string;
/**
 * Pad a string on the left to reach a target visual width.
 */
export declare function visualPadStart(str: string, targetWidth: number, fillChar?: string): string;
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