Inherit ToolBarSpacerView from ToolBarItem

lib/tool-bar-manager.js

@@ -1,6 +1,6 @@
 const { ToolBarItem } = require('./tool-bar-item');
 const { ToolBarButtonView } = require('./tool-bar-button-view');
-const ToolBarSpacerView = require('./tool-bar-spacer-view');
+const { ToolBarSpacerView } = require('./tool-bar-spacer-view');
 
 module.exports = class ToolBarManager {
   constructor (group, toolBarView, touchBarManager) {

lib/tool-bar-spacer-view.js

@@ -1,19 +1,19 @@
-module.exports = class ToolBarSpacerView {
+const { ToolBarItem } = require('./tool-bar-item');
+
+class ToolBarSpacerView extends ToolBarItem {
   constructor (options, group) {
-    this.element = document.createElement('hr');
-    this.priority = options && options.priority;
-    this.group = group;
+    // first calling the super (ToolBarItem) constructor
+    super({
+      element: document.createElement('hr'),
+      priority: options && options.priority
+    }, group);
+
     const classNames = ['tool-bar-spacer'];
     if (this.priority < 0) {
       classNames.push('tool-bar-item-align-end');
     }
     this.element.classList.add(...classNames);
   }
-
-  destroy () {
-    if (this.element.parentNode) {
-      this.element.parentNode.removeChild(this.element);
-    }
-    this.element = null;
-  }
 };
+
+module.exports.ToolBarSpacerView = ToolBarSpacerView;