From e06190e06a7cebcced96aa708be83174176186a0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E6=BD=98=E5=BF=97=E5=9D=9A?=
 <panzj@users.noreply.github.com>
Date: Sat, 26 Nov 2016 01:39:23 +0800
Subject: [PATCH] 'to' maybe undefined (#4216)

---
 modules/Link.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/Link.js b/modules/Link.js
index fcab089092..7547114999 100644
--- a/modules/Link.js
+++ b/modules/Link.js
@@ -105,7 +105,7 @@ const Link = React.createClass({
 
     if (router) {
       // If user does not specify a `to` prop, return an empty anchor tag.
-      if (to == null) { return <a {...props} /> }
+      if (!to) { return <a {...props} /> }
 
       const toLocation = resolveToLocation(to, router)
       props.href = router.createHref(toLocation)