Animate when boosting (puffing up)

app/javascript/controllers/toggle_class_controller.js

@@ -0,0 +1,9 @@
+import { Controller } from "@hotwired/stimulus"
+
+export default class extends Controller {
+  static classes = [ "toggle" ]
+
+  toggle() {
+    this.element.classList.toggle(this.toggleClass)
+  }
+}