Function displayWidth

src/setup/prompt.ts:39–42

(s: string)

/** Visible width of a string: length with ANSI SGR (colour/dim) escapes removed. Pure → testable. */
export function displayWidth(s: string): number {
  // eslint-disable-next-line no-control-regex
  return s.replace(/\x1b\[[0-9;]*m/g, '').length;
}

/** How many PHYSICAL terminal rows a logical line occupies once the terminal wraps
 *  it at `cols`. A line wider than the terminal wraps to ⌈width/cols⌉ rows; empty