19 lines
564 B
Text
19 lines
564 B
Text
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// @flow
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import getParentNode from './getParentNode';
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import isScrollParent from './isScrollParent';
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import getNodeName from './getNodeName';
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import { isHTMLElement } from './instanceOf';
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export default function getScrollParent(node: Node): HTMLElement {
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if (['html', 'body', '#document'].indexOf(getNodeName(node)) >= 0) {
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// $FlowFixMe[incompatible-return]: assume body is always available
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return node.ownerDocument.body;
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}
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if (isHTMLElement(node) && isScrollParent(node)) {
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return node;
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}
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return getScrollParent(getParentNode(node));
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}
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