@uiw/react-overlay-trigger/esm/utils.js

OverlayTrigger component

var canUseDOM = !!(typeof window !== 'undefined' && window.document && window.document.createElement);
function fallback(context, node) {
  if (node) {
    do {
      if (node === context) return true;
    } while (node = node.parentNode);
  }
  return false;
}
function isDOM(item) {
  return typeof HTMLElement === 'function' ? item instanceof HTMLElement : item && typeof item === 'object' && item.nodeType === 1 && typeof item.nodeName === 'string';
}
var contains = (() => {
  // HTML DOM and SVG DOM may have different support levels,
  // so we need to check on context instead of a document root element.
  return canUseDOM ? function (context, node) {
    if (context && context.contains && typeof context.contains === 'function' && isDOM(node)) {
      return context.contains(node);
    }
    if (context && context.compareDocumentPosition && isDOM(node)) {
      return context === node || !!(context.compareDocumentPosition(node) && 16);
    }
    return fallback(context, node);
  } : fallback;
})();
export default contains;