Extract Tag controller

assets/controllers/tag_controller.js

@@ -0,0 +1,12 @@
+import { Controller } from '@hotwired/stimulus';
+
+export default class extends Controller {
+  static targets = ['link', 'edit', 'form', 'input'];
+
+  showForm() {
+    this.formTarget.classList.remove('hidden');
+    this.editTarget.classList.add('hidden');
+    this.linkTarget.classList.add('hidden');
+    this.inputTarget.focus();
+  }
+}