fix: isPlainObject: add quick comparison between input and Object t…

…o short-circuit taxing `Function.toString` invocations (#805)
immerjs · Jun 9, 2021 · 07575f3 · 07575f3
1 parent 5cb208b
commit 07575f3
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/utils/common.ts b/src/utils/common.ts
@@ -46,6 +46,10 @@ export function isPlainObject(value: any): boolean {
 	}
 	const Ctor =
 		Object.hasOwnProperty.call(proto, "constructor") && proto.constructor
+
+	if (Ctor === Object)
+		return true
+
 	return (
 		typeof Ctor == "function" &&
 		Function.toString.call(Ctor) === objectCtorString