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26 lines
1.1 KiB
26 lines
1.1 KiB
import getScrollParent from "./getScrollParent.js";
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import getParentNode from "./getParentNode.js";
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import getWindow from "./getWindow.js";
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import isScrollParent from "./isScrollParent.js";
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/*
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given a DOM element, return the list of all scroll parents, up the list of ancesors
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until we get to the top window object. This list is what we attach scroll listeners
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to, because if any of these parent elements scroll, we'll need to re-calculate the
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reference element's position.
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*/
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export default function listScrollParents(element, list) {
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var _element$ownerDocumen;
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if (list === void 0) {
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list = [];
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}
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var scrollParent = getScrollParent(element);
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var isBody = scrollParent === ((_element$ownerDocumen = element.ownerDocument) == null ? void 0 : _element$ownerDocumen.body);
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var win = getWindow(scrollParent);
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var target = isBody ? [win].concat(win.visualViewport || [], isScrollParent(scrollParent) ? scrollParent : []) : scrollParent;
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var updatedList = list.concat(target);
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return isBody ? updatedList : // $FlowFixMe[incompatible-call]: isBody tells us target will be an HTMLElement here
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updatedList.concat(listScrollParents(getParentNode(target)));
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}
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