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