34 lines
764 B
JavaScript
34 lines
764 B
JavaScript
/** @type {number | null} */
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let cachedScrollbarWidth = null;
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/**
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* @return {number}
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*/
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const getActualScrollbarWidth = () => {
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const outer = document.createElement('div');
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outer.style.visibility = 'hidden';
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outer.style.overflow = 'scroll';
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document.body.appendChild(outer);
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const inner = document.createElement('div');
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outer.appendChild(inner);
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const scrollbarWidth = outer.offsetWidth - inner.offsetWidth;
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outer.parentNode.removeChild(outer);
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return scrollbarWidth;
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};
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/**
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* @return {number}
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*/
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export const getScrollbarWidth = () => {
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if (cachedScrollbarWidth !== null) {
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return cachedScrollbarWidth;
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}
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const scrollbarWidth = getActualScrollbarWidth();
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cachedScrollbarWidth = scrollbarWidth;
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return scrollbarWidth;
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};
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