feat: properly destroy objects on disconnect from dom

assets/controllers/sortable_controller.js

@@ -7,7 +7,7 @@ export default class extends Controller {
     static targets = ['item', 'handle']
 
     connect() {
-        new Sortable(this.element, {
+        this.sortable = new Sortable(this.element, {
             item: '[data-sortable-target="item"]',
             handle: '[data-sortable-target="handle"]',
             onEnd: e => {
@@ -31,4 +31,8 @@ export default class extends Controller {
             body: JSON.stringify({ ordering: ordering })
         })
     }
+
+    disconnect() {
+        this.sortable.destroy()
+    }
 }