From 0adead109d631858eee89066a5d87777e4d3eac7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gert=20S=C3=B8nderby?= <gert.sonderby@gmail.com>
Date: Wed, 4 Apr 2018 11:05:05 +0200
Subject: [PATCH] Made optional arguments for browser router optional in flow
 type.

---
 src/environment/browser-router.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/environment/browser-router.js b/src/environment/browser-router.js
index 3fa11697..fae921d2 100644
--- a/src/environment/browser-router.js
+++ b/src/environment/browser-router.js
@@ -8,9 +8,9 @@ import install from '../install';
 
 type BrowserRouterArgs = {
   routes: Object,
-  basename: string,
-  historyOptions: BrowserHistoryOptions,
-  history: History
+  basename?: string,
+  historyOptions?: BrowserHistoryOptions,
+  history?: History
 };
 
 export const createBrowserRouter = (installer: Function) => ({
@@ -28,7 +28,7 @@ export const createBrowserRouter = (installer: Function) => ({
 
   // Strip the basename from the initial pathname
   const pathname =
-    fullPathname.indexOf(basename) === 0
+    basename && fullPathname.indexOf(basename) === 0
       ? fullPathname.slice(basename.length)
       : fullPathname;