@are-visual/virtual-table/middleware/utils/getScrollbarSize.js

### VirtualTable

/** 获取默认的滚动条大小 */
export function getScrollbarSize() {
    const scrollDiv = document.createElement('div');
    scrollDiv.style.position = 'absolute';
    scrollDiv.style.width = '100px';
    scrollDiv.style.height = '100px';
    scrollDiv.style.overflow = 'scroll';
    scrollDiv.style.top = '-9999px';
    document.body.appendChild(scrollDiv);
    const scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
    const scrollbarHeight = scrollDiv.offsetHeight - scrollDiv.clientHeight;
    document.body.removeChild(scrollDiv);
    return { width: scrollbarWidth, height: scrollbarHeight };
}
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