axe-core/lib/commons/dom/get-root-node.js

Accessibility engine for automated Web UI testing

/* global dom */

/**
 * Return the document or document fragment (shadow DOM)
 * @method getRootNode
 * @memberof axe.commons.dom
 * @instance
 * @param {Element} node
 * @returns {DocumentFragment|Document}
 */
dom.getRootNode = function (node) {
	var doc = (node.getRootNode && node.getRootNode()) || document; // this is for backwards compatibility
	if (doc === node) {
		// disconnected node
		doc = document;
	}
	return doc;
};