From 78a9a249154fa3f662e64ed17a639f9c2d8b52b3 Mon Sep 17 00:00:00 2001
From: Denis Pushkarev <zloirock@zloirock.ru>
Date: Sun, 6 Dec 2020 07:49:32 +0700
Subject: [PATCH] fix work of new `%TypedArray%` methods on `BigInt` arrays

---
 CHANGELOG.md                                       |  1 +
 .../core-js/internals/array-buffer-view-core.js    | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ffdcb158768..5a941809b293 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ## Changelog
 ##### Unreleased
+- Fixed work of new `%TypedArray%` methods on `BigInt` arrays
 - Added ESNext methods to ES3 workaround for `Number` constructor wrapper
 
 ##### 3.8.0 - 2020.11.26
diff --git a/packages/core-js/internals/array-buffer-view-core.js b/packages/core-js/internals/array-buffer-view-core.js
index 2952bc673a41..2f69fb0714ff 100644
--- a/packages/core-js/internals/array-buffer-view-core.js
+++ b/packages/core-js/internals/array-buffer-view-core.js
@@ -41,13 +41,23 @@ var TypedArrayConstructorsList = {
   Float64Array: 8
 };
 
+var BigIntArrayConstructorsList = {
+  BigInt64Array: 8,
+  BigUint64Array: 8
+};
+
 var isView = function isView(it) {
   var klass = classof(it);
-  return klass === 'DataView' || has(TypedArrayConstructorsList, klass);
+  return klass === 'DataView'
+    || has(TypedArrayConstructorsList, klass)
+    || has(BigIntArrayConstructorsList, klass);
 };
 
 var isTypedArray = function (it) {
-  return isObject(it) && has(TypedArrayConstructorsList, classof(it));
+  return isObject(it) && (
+    has(TypedArrayConstructorsList, classof(it)) ||
+    has(BigIntArrayConstructorsList, classof(it))
+  );
 };
 
 var aTypedArray = function (it) {