From bf255139f0af45a757ac1fef101150efc5e544ab Mon Sep 17 00:00:00 2001
From: Marcos Passos <marcospassos@users.noreply.github.com>
Date: Wed, 22 Jul 2020 10:50:49 -0300
Subject: [PATCH] Handle cases where the domain is undefined

---
 src/cookie.ts       | 2 +-
 test/cookie.test.ts | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/cookie.ts b/src/cookie.ts
index d7f4f9d6..c9b32259 100644
--- a/src/cookie.ts
+++ b/src/cookie.ts
@@ -1,4 +1,4 @@
-export function getBaseDomain(domain = window.document.domain): string {
+export function getBaseDomain(domain = window.document.domain ?? ''): string {
     const parts: string[] = domain.split('.');
     const random = `___${Math.random()}`;
 
diff --git a/test/cookie.test.ts b/test/cookie.test.ts
index 26f63f82..17da3a94 100644
--- a/test/cookie.test.ts
+++ b/test/cookie.test.ts
@@ -15,6 +15,11 @@ beforeEach(() => {
 });
 
 describe('A function to detect the base domain', () => {
+    test('should not fail if the domain is undefined', () => {
+        expect(document.domain).toBeUndefined();
+        expect(getBaseDomain()).toBe('');
+    });
+
     test('should detect the top-most domain that allows for setting cookies', () => {
         let cookie = '';
         cookieSetter.mockImplementation(value => {