26 lines
No EOL
1.1 KiB
JavaScript
26 lines
No EOL
1.1 KiB
JavaScript
import getScrollParent from "./getScrollParent.js";
|
|
import getParentNode from "./getParentNode.js";
|
|
import getWindow from "./getWindow.js";
|
|
import isScrollParent from "./isScrollParent.js";
|
|
/*
|
|
given a DOM element, return the list of all scroll parents, up the list of ancesors
|
|
until we get to the top window object. This list is what we attach scroll listeners
|
|
to, because if any of these parent elements scroll, we'll need to re-calculate the
|
|
reference element's position.
|
|
*/
|
|
|
|
export default function listScrollParents(element, list) {
|
|
var _element$ownerDocumen;
|
|
|
|
if (list === void 0) {
|
|
list = [];
|
|
}
|
|
|
|
var scrollParent = getScrollParent(element);
|
|
var isBody = scrollParent === ((_element$ownerDocumen = element.ownerDocument) == null ? void 0 : _element$ownerDocumen.body);
|
|
var win = getWindow(scrollParent);
|
|
var target = isBody ? [win].concat(win.visualViewport || [], isScrollParent(scrollParent) ? scrollParent : []) : scrollParent;
|
|
var updatedList = list.concat(target);
|
|
return isBody ? updatedList : // $FlowFixMe[incompatible-call]: isBody tells us target will be an HTMLElement here
|
|
updatedList.concat(listScrollParents(getParentNode(target)));
|
|
} |