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app/javascript/controllers/dialog_controller.js

@@ -4,6 +4,10 @@ export default class extends Controller {
   static targets = [ "dialog" ]
 
   open() {
-    this.dialogTarget.show()
+    this.dialogTarget.showModal()
+  }
+
+  close() {
+    this.dialogTarget.close()
   }
 }