Minor refactoring

src/common/constants.js

@@ -10,6 +10,8 @@ export const ID_OVERLAY = 'driver-page-overlay';
 export const ID_STAGE = 'driver-highlighted-element-stage';
 export const ID_POPOVER = 'driver-popover-item';
 
+export const DRIVER_HIGHLIGHTED_ELEMENT = 'driver-highlighted-element';
+
 export const CLASS_POPOVER_TIP = 'driver-popover-tip';
 export const CLASS_POPOVER_TITLE = 'driver-popover-title';
 export const CLASS_POPOVER_DESCRIPTION = 'driver-popover-description';

src/core/element.js

 import Position from './position';
-import { ANIMATION_DURATION_MS } from "../common/constants";
+import { ANIMATION_DURATION_MS, DRIVER_HIGHLIGHTED_ELEMENT } from '../common/constants';
 
 /**
  * Wrapper around DOMElements to enrich them
@@ -140,7 +140,7 @@ export default class Element {
   onDeselected() {
     this.hidePopover();
 
-    this.node.classList.remove('driver-highlighted-element');
+    this.node.classList.remove(DRIVER_HIGHLIGHTED_ELEMENT);
 
     this.highlightFinished = false;