/**
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* Gets the scroll value of the given element in the given side (top and left)
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* @method
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* @memberof Popper.Utils
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* @argument {Element} element
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* @argument {String} side `top` or `left`
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* @returns {number} amount of scrolled pixels
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*/
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export default function getScroll(element, side = 'top') {
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const upperSide = side === 'top' ? 'scrollTop' : 'scrollLeft';
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const nodeName = element.nodeName;
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if (nodeName === 'BODY' || nodeName === 'HTML') {
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const html = element.ownerDocument.documentElement;
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const scrollingElement = element.ownerDocument.scrollingElement || html;
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return scrollingElement[upperSide];
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}
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return element[upperSide];
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}
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