```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' || limit < 3) {
    throw new Error("Limit must be a positive integer");
  }
  const actualLength = Math.min(text.length, limit);
  return text.slice(0, actualLength - 2) + "...";
}
```