Edit File: getScrollParent.js
import getStyleComputedProperty from './getStyleComputedProperty'; import getParentNode from './getParentNode'; /** * Returns the scrolling parent of the given element * @method * @memberof Popper.Utils * @argument {Element} element * @returns {Element} scroll parent */ export default function getScrollParent(element) { // Return body, `getScroll` will take care to get the correct `scrollTop` from it if (!element) { return document.body } switch (element.nodeName) { case 'HTML': case 'BODY': return element.ownerDocument.body case '#document': return element.body } // Firefox want us to check `-x` and `-y` variations as well const { overflow, overflowX, overflowY } = getStyleComputedProperty(element); if (/(auto|scroll|overlay)/.test(overflow + overflowY + overflowX)) { return element; } return getScrollParent(getParentNode(element)); }
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