```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 && text.length > limit) {
    return text.slice(0, limit - 3) + "...";
  }
  if (text.length < limit || !Number.isInteger(limit) || limit < 3) {
    throw new Error("Invalid limit");
  }
  return text;
}
```