Merge pull request #109 from PottyZA/master

Fix for elementCanBeScrolled failing if node is not an HTMLElement inside a shadow root

Author: theKashey

src/handleScroll.ts

@@ -1,10 +1,12 @@
-import { Axis } from './types';
+import {Axis} from './types';
 
 const alwaysContainsScroll = (node: HTMLElement): boolean =>
  // textarea will always _contain_ scroll inside self. It only can be hidden
  node.tagName === 'TEXTAREA';
 
 const elementCanBeScrolled = (node: HTMLElement, overflow: 'overflowX' | 'overflowY'): boolean => {
+ if (!(node instanceof HTMLElement)) return false;
+ 
  const styles = window.getComputedStyle(node);
 
  return (