From 266915d5ce354fde12b20f8f5ceb5ffdfacb7983 Mon Sep 17 00:00:00 2001
From: Kenta Moriuchi <moriken@kimamass.com>
Date: Sun, 29 Jan 2023 23:15:01 +0900
Subject: fix(ext): internal `structuredClone` for `ArrayBuffer` and
 `TypedArray` subclasses (#17431)

---
 ext/webidl/00_webidl.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'ext/webidl/00_webidl.js')

diff --git a/ext/webidl/00_webidl.js b/ext/webidl/00_webidl.js
index 4127d24bf..bb90d973e 100644
--- a/ext/webidl/00_webidl.js
+++ b/ext/webidl/00_webidl.js
@@ -77,6 +77,7 @@
     Symbol,
     SymbolIterator,
     SymbolToStringTag,
+    TypedArrayPrototypeGetSymbolToStringTag,
     TypeError,
     Uint16Array,
     Uint32Array,
@@ -442,6 +443,11 @@
     return V;
   }
 
+  function isDataView(V) {
+    return ArrayBufferIsView(V) &&
+      TypedArrayPrototypeGetSymbolToStringTag(V) === undefined;
+  }
+
   function isNonSharedArrayBuffer(V) {
     return ObjectPrototypeIsPrototypeOf(ArrayBufferPrototype, V);
   }
@@ -467,7 +473,7 @@
   };
 
   converters.DataView = (V, opts = {}) => {
-    if (!(ObjectPrototypeIsPrototypeOf(DataViewPrototype, V))) {
+    if (!isDataView(V)) {
       throw makeException(TypeError, "is not a DataView", opts);
     }
 
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