luhn-generator/update/node_modules/axe-core/lib/commons/dom/focus-disabled.js

A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

import AbstractVirtualNode from '../../core/base/virtual-node/abstract-virtual-node';
import { getNodeFromTree } from '../../core/utils';
import isHiddenWithCSS from './is-hidden-with-css';

/**
 * Determines if focusing has been disabled on an element.
 * @param {HTMLElement|VirtualNode} el The HTMLElement
 * @return {Boolean} Whether focusing has been disabled on an element.
 */
function focusDisabled(el) {
	const vNode = el instanceof AbstractVirtualNode ? el : getNodeFromTree(el);

	if (vNode.hasAttr('disabled')) {
		return true;
	}

	if (vNode.props.nodeName !== 'area') {
		// if the virtual node does not have an actual node, treat it
		// as not hidden
		if (!vNode.actualNode) {
			return false;
		}

		return isHiddenWithCSS(vNode.actualNode);
	}

	return false;
}

export default focusDisabled;