Current File : /var/www/html/node_modules/@popperjs/core/lib/dom-utils/contains.js.flow
// @flow
import { isShadowRoot } from './instanceOf';
export default function contains(parent: Element, child: Element) {
const rootNode = child.getRootNode && child.getRootNode();
// First, attempt with faster native method
if (parent.contains(child)) {
return true;
}
// then fallback to custom implementation with Shadow DOM support
else if (rootNode && isShadowRoot(rootNode)) {
let next = child;
do {
if (next && parent.isSameNode(next)) {
return true;
}
// $FlowFixMe[prop-missing]: need a better way to handle this...
next = next.parentNode || next.host;
} while (next);
}
// Give up, the result is false
return false;
}
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