From eb9719467f7c143a26bfd2d598b3903ff0815731 Mon Sep 17 00:00:00 2001
From: Eric Clemmons <eric@smarterspam.com>
Date: Mon, 10 Aug 2020 11:55:37 -0700
Subject: [PATCH] fix(@aws-amplify/auth): Default hash to `#` when null (#6279)

---
 packages/auth/src/OAuth/OAuth.ts | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/packages/auth/src/OAuth/OAuth.ts b/packages/auth/src/OAuth/OAuth.ts
index 96159e11998..7b61bd0417e 100644
--- a/packages/auth/src/OAuth/OAuth.ts
+++ b/packages/auth/src/OAuth/OAuth.ts
@@ -183,8 +183,9 @@ export default class OAuth {
 	}
 
 	private async _handleImplicitFlow(currentUrl: string) {
-		const { id_token, access_token } = parse(currentUrl)
-			.hash.substr(1) // Remove # from returned code
+		// hash is `null` if `#` doesn't exist on URL
+		const { id_token, access_token } = (parse(currentUrl).hash || '#')
+			.substr(1) // Remove # from returned code
 			.split('&')
 			.map(pairings => pairings.split('='))
 			.reduce((accum, [k, v]) => ({ ...accum, [k]: v }), {