fix(tabs): Handle nodes with parentNode set to undefined instead of n…

…ull correctly

package.json

@@ -12,8 +12,8 @@
     "build:esm": "babel src/ --out-dir esm/ --ignore **/__tests__,**/__mocks__",
     "build:umd": "rollup -c",
     "build": "npm-run-all clean:* --parallel build:*",
-    "format": "eslint src --fix",
-    "lint": "eslint src",
+    "format": "eslint src --fix --report-unused-disable-directives",
+    "lint": "eslint src --report-unused-disable-directives",
     "precommit": "lint-staged",
     "prebump": "run-s lint test",
     "prepublish": "yarn run build",

src/components/UncontrolledTabs.js

@@ -7,14 +7,18 @@ import { getPanelsCount, getTabsCount } from '../helpers/count';
 import { deepMap } from '../helpers/childrenDeepMap';
 import { isTabList, isTabPanel, isTab } from '../helpers/elementTypes';
 
+function isNode(node) {
+  return node && 'getAttribute' in node;
+}
+
 // Determine if a node from event.target is a Tab element
 function isTabNode(node) {
-  return 'getAttribute' in node && node.getAttribute('role') === 'tab';
+  return isNode(node) && node.getAttribute('role') === 'tab';
 }
 
 // Determine if a tab node is disabled
 function isTabDisabled(node) {
-  return node.getAttribute('aria-disabled') === 'true';
+  return isNode(node) && node.getAttribute('aria-disabled') === 'true';
 }
 
 let canUseActiveElement;
@@ -298,7 +302,7 @@ export default class UncontrolledTabs extends Component {
         this.setSelected(index, e);
         return;
       }
-    } while ((node = node.parentNode) !== null);
+    } while ((node = node.parentNode) != null);
   };
 
   /**

src/components/__tests__/Tabs-test.js

@@ -1,5 +1,4 @@
 /* eslint-env jest */
-/* eslint-disable react/no-multi-comp */
 import React from 'react';
 import Enzyme, { shallow, mount } from 'enzyme';
 import Adapter from 'enzyme-adapter-react-16';