@patternfly/react-core
Version:
This library provides a set of common React components for use with the PatternFly reference implementation.
28 lines (25 loc) • 732 B
text/typescript
// @ts-nocheck
/**
* @param parent
* @param child
*/
export default function contains(parent: Element, child: Element) {
// $FlowFixMe: hasOwnProperty doesn't seem to work in tests
const isShadow = Boolean(child.getRootNode && child.getRootNode().host);
// First, attempt with faster native method
if (parent.contains(child)) {
return true;
} // then fallback to custom implementation with Shadow DOM support
else if (isShadow) {
let next = child;
do {
if (next && parent.isSameNode(next)) {
return true;
}
// $FlowFixMe: need a better way to handle this...
next = next.parentNode || next.host;
} while (next);
}
// Give up, the result is false
return false;
}