chore: use toStringTag getter

mongodb · Nov 26, 2024 · fd2e7dd · fd2e7dd
1 parent dd11dcb
commit fd2e7dd
Showing 1 changed file with 13 additions and 26 deletions.
diff --git a/src/parser/utils.ts b/src/parser/utils.ts
@@ -1,37 +1,24 @@
-export function isAnyArrayBuffer(value: unknown): value is ArrayBuffer {
-  return (
-    typeof value === 'object' &&
-    value != null &&
-    Symbol.toStringTag in value &&
-    (value[Symbol.toStringTag] === 'ArrayBuffer' ||
-      value[Symbol.toStringTag] === 'SharedArrayBuffer')
-  );
-}
+const TypedArrayPrototypeGetSymbolToStringTag = (() => {
+  // eslint-disable-next-line @typescript-eslint/unbound-method -- the intention is to call this method with a bound value
+  const g = Object.getOwnPropertyDescriptor(
+    Object.getPrototypeOf(Uint8Array.prototype),
+    Symbol.toStringTag
+  )!.get!;
 
-export function isUint8Array(value: unknown): value is Uint8Array {
-  return (
-    typeof value === 'object' &&
-    value != null &&
-    Symbol.toStringTag in value &&
-    value[Symbol.toStringTag] === 'Uint8Array'
-  );
-}
+  return (value: unknown) => g.call(value);
+})();
 
-export function isBigInt64Array(value: unknown): value is BigInt64Array {
-  return (
-    typeof value === 'object' &&
-    value != null &&
-    Symbol.toStringTag in value &&
-    value[Symbol.toStringTag] === 'BigInt64Array'
-  );
+export function isUint8Array(value: unknown): value is Uint8Array {
+  return TypedArrayPrototypeGetSymbolToStringTag(value) === 'Uint8Array';
 }
 
-export function isBigUInt64Array(value: unknown): value is BigUint64Array {
+export function isAnyArrayBuffer(value: unknown): value is ArrayBuffer {
   return (
     typeof value === 'object' &&
     value != null &&
     Symbol.toStringTag in value &&
-    value[Symbol.toStringTag] === 'BigUint64Array'
+    (value[Symbol.toStringTag] === 'ArrayBuffer' ||
+      value[Symbol.toStringTag] === 'SharedArrayBuffer')
   );
 }