```typescript
/** The text, cut to limit characters with an ellipsis when it is longer. */
export function truncate(text: string, limit: number): string {
  if (typeof limit !== 'number' || Math.floor(limit) !== limit) {
    throw new Error('Limit must be an integer');
  }

  if (limit < 3) {
    throw new Error('Limit must be at least 3 to accommodate the ellipsis');
  }

  return text.length <= limit ? text : `${text.slice(0, limit - 3)}...`;
}
```