@mui/x-internals/domUtils/isHTMLElement.mjs

Utility functions for the MUI X packages (internal use only).

import ownerWindow from '@mui/utils/ownerWindow';

/**
 * Checks if a value is an HTMLElement, including elements from other iframes/realms.
 */
export function isHTMLElement(value) {
  if (typeof window === 'undefined' || value == null) {
    return false;
  }
  if (value instanceof HTMLElement) {
    return true;
  }
  // Cross-realm: must be an element node (nodeType 1) from another window.
  // The try/catch guards against detached/destroyed windows where accessing
  // `.HTMLElement` on the owner window may throw.
  try {
    return value.nodeType === 1 && value instanceof ownerWindow(value).HTMLElement;
  } catch {
    return false;
  }
}