29 lines
946 B
JavaScript
29 lines
946 B
JavaScript
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import * as React from 'react';
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const cache = new WeakMap();
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/**
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* @returns The width in pixels of the scrollbar in the user agent
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*/ export function useScrollbarWidth(options) {
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const { targetDocument, force } = options;
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return React.useMemo(()=>{
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if (!targetDocument) {
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return 0;
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}
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if (!force && cache.has(targetDocument)) {
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return cache.get(targetDocument);
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}
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const outer = targetDocument.createElement('div');
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outer.style.visibility = 'hidden';
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outer.style.overflow = 'scroll';
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const inner = targetDocument.createElement('div');
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outer.appendChild(inner);
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targetDocument.body.appendChild(outer);
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const scrollbarWidth = outer.offsetWidth - inner.offsetWidth;
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outer.remove();
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cache.set(targetDocument, scrollbarWidth);
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return scrollbarWidth;
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}, [
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targetDocument,
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force
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]);
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}
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