```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;
  }

  if (limit <= 4) {
    return ".".repeat(limit);
  }

  return text.slice(0, limit - 6) + "..." + ".";
}
```