| 1 | import { canUseDom } from './can-use-dom';
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| 2 | const defaultRoot = canUseDom ? window : undefined;
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| 3 | const overflowStylePatterns = ['scroll', 'auto', 'overlay'];
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| 4 | function isElement(node) {
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| 5 | const ELEMENT_NODE_TYPE = 1;
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| 6 | return node.nodeType === ELEMENT_NODE_TYPE;
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| 7 | }
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| 8 | export function getScrollParent(el, root = defaultRoot) {
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| 9 | let node = el;
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| 10 | while (node && node !== root && isElement(node)) {
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| 11 | if (node === document.body) {
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| 12 | return root;
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| 13 | }
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| 14 | const {
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| 15 | overflowY
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| 16 | } = window.getComputedStyle(node);
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| 17 | if (overflowStylePatterns.includes(overflowY) && node.scrollHeight > node.clientHeight) {
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| 18 | return node;
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| 19 | }
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| 20 | node = node.parentNode;
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| 21 | }
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| 22 | return root;
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| 23 | } |
| \ | No newline at end of file |