From 0425a254e31f01ac9ae6f149d2ae9e7482d67e77 Mon Sep 17 00:00:00 2001
From: "wcoder.com" <350840291@qq.com>
Date: Fri, 10 Jan 2020 11:07:39 +0800
Subject: [PATCH] Update navigation.js

Uncaught TypeError: Cannot read property 'split' of undefined
---
 src/js/theme/navigation.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/js/theme/navigation.js b/src/js/theme/navigation.js
index dd64d8b5..05312570 100644
--- a/src/js/theme/navigation.js
+++ b/src/js/theme/navigation.js
@@ -167,7 +167,7 @@ function setChapterActive($chapter, hash) {
 // Return the hash of link for a chapter
 function getChapterHash($chapter) {
     var $link = $chapter.children('a'),
-        hash = $link.attr('href').split('#')[1];
+        hash = ($link.attr('href')||"").split('#')[1];
 
     if (hash) hash = '#'+hash;
     return (!!hash)? hash : '';
@@ -380,7 +380,7 @@ function preparePage(resetScroll) {
             return false;
         }
         else {
-            href = $link.attr('href').split('#')[0];
+            href = ($link.attr('href')||"").split('#')[0];
         }
 
         var resolvedRef = url.resolve(window.location.pathname, href);