tupleson/src/internals/isPlainObject.ts

A hackable JSON serializer/deserializer

export const isPlainObject = (obj: unknown): obj is Record<string, unknown> => {
	if (!obj || typeof obj !== "object") {
		return false;
	}

	if (obj === Object.prototype) {
		return false;
	}

	if (Object.getPrototypeOf(obj) === null) {
		return true;
	}

	return Object.getPrototypeOf(obj) === Object.prototype;
};