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