1 files changed, 4 insertions, 0 deletions
diff --git a/js/form_data.ts b/js/form_data.ts
index 3b3096785..1a8a72826 100644
--- a/js/form_data.ts
+++ b/js/form_data.ts
@@ -136,6 +136,10 @@ class FormDataBase {
       }
     }
   }
+
+  get [Symbol.toStringTag](): string {
+    return "FormData";
+  }
 }
 
 export class FormData extends DomIterableMixin<