js页面缓慢滚动底部

// 示例代码：虚拟滚动
function renderVisibleItems(startIndex, endIndex) {
    // 渲染 startIndex 到 endIndex 的元素
}

window.addEventListener('scroll', () => {
    const startIndex = Math.floor(window.scrollY / itemHeight);
    const endIndex = startIndex + visibleItemCount;
    renderVisibleItems(startIndex, endIndex);
});

// 示例代码：防抖函数
function debounce(func, wait) {
    let timeout;
    return function(...args) {
        clearTimeout(timeout);
        timeout = setTimeout(() => func.apply(this, args), wait);
    };
}

window.addEventListener('scroll', debounce(() => {
    // 复杂的操作
}, 100));

<!-- 示例代码：异步加载 JavaScript -->
<script src="path/to/script.js" async></script>