@exadel/esl/modules/esl-utils/dom/api.js

Exadel Smart Library (ESL) is the lightweight custom elements library that provide a set of super-flexible components

import { isObject, isPlainObject } from '../misc/object/types';
/** Checks that passed value is an DOM Element Node */
export const isElement = (el) => {
    return isObject(el) && el.nodeType === 1 && !isPlainObject(el);
};
/**
 * Get the Element that is the root element of the document.
 * @param element - element for which to get the document element
 * */
export const getDocument = (element = window) => {
    return (element instanceof Window ? element.document : element.ownerDocument).documentElement;
};
/**
 * Get the name of node.
 * @param element - element for which to get the name
 */
export const getNodeName = (element) => {
    return element && !(element instanceof Window) ? (element.nodeName).toLowerCase() : '';
};
/**
 * Get the parent of the specified element in the DOM tree.
 * @param element - element for which to get the parent
 */
export const getParentNode = (element) => {
    if (getNodeName(element) === 'html')
        return element;
    return (window.ShadowRoot
        ? element instanceof ShadowRoot
            ? element.host
            : element.assignedSlot || element.parentNode
        : element.parentNode) || getDocument(element);
};