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JavaScript

/**
* Measures the width of the scrollbar for the given document.
*
* @param targetDocument - Document to measure the scrollbar width
* @returns The width of the scrollbar in pixels
*/ export function measureScrollbarWidth(targetDocument) {
const outer = targetDocument.createElement('div');
outer.style.visibility = 'hidden';
outer.style.overflow = 'scroll';
const inner = targetDocument.createElement('div');
outer.appendChild(inner);
targetDocument.body.appendChild(outer);
const scrollbarWidth = outer.offsetWidth - inner.offsetWidth;
outer.remove();
return scrollbarWidth;
}