```ts
/** The text, cut to limit characters with an ellipsis when it is longer. */
export function truncate(text: string, limit: number): string {
  if (!Number.isInteger(limit) || limit < 3) throw new Error("limit must be an integer of at least 3");
  if (text.length <= limit) return text;
  return `${text.slice(0, limit - 4)}...`;
}
```