2 files changed, 20 insertions, 1 deletions
diff --git a/extensions/webidl/00_webidl.js b/extensions/webidl/00_webidl.js
index 87e9eccb7..3e6dc95eb 100644
--- a/extensions/webidl/00_webidl.js
+++ b/extensions/webidl/00_webidl.js
@@ -564,7 +564,10 @@
     converters.USVString,
   );
   converters["sequence<double>"] = createSequenceConverter(
-    converters["double"],
+    converters.double,
+  );
+  converters["sequence<object>"] = createSequenceConverter(
+    converters.object,
   );
   converters["Promise<undefined>"] = createPromiseConverter(() => undefined);
 
@@ -630,6 +633,7 @@
             get() {
               return member.defaultValue;
             },
+            enumerable: true,
           });
         }
       }
diff --git a/extensions/webidl/internal.d.ts b/extensions/webidl/internal.d.ts
index 4d0f1ad45..9d151a6d1 100644
--- a/extensions/webidl/internal.d.ts
+++ b/extensions/webidl/internal.d.ts
@@ -321,6 +321,21 @@ declare namespace globalThis {
        * Configure prototype properties enumerability / writability / configurability.
        */
       declare function configurePrototype(prototype: any);
+
+      /**
+       * Get the WebIDL / ES type of a value.
+       */
+      declare function type(
+        v: any,
+      ):
+        | "Null"
+        | "Undefined"
+        | "Boolean"
+        | "Number"
+        | "String"
+        | "Symbol"
+        | "BigInt"
+        | "Object";
     }
   }
 }