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Challenge: Build a Virtualized List Component

Implement this from the stub. Hidden tests grade the behaviour you write, not the comments you leave.

Challenge: Virtualized List

import { useState, useRef, useEffect, useCallback } from 'react';

interface VirtualizedListProps<T> {
  items: T[];
  itemHeight: number;
  containerHeight: number;
  overscan?: number;
  renderItem: (item: T, index: number) => React.ReactNode;
  onScroll?: (scrollTop: number) => void;
  onReachEnd?: () => void;
  reachEndThreshold?: number;
}

// Your implementation here

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