From 0435b080075f0df36b79659bdc7a3be1bde3e8e5 Mon Sep 17 00:00:00 2001
From: Adriano Skroch <adriano.skroch@gmail.com>
Date: Wed, 19 Oct 2016 17:26:00 -0200
Subject: [PATCH] Check if the "a" element has a "href" attribute

---
 lib/cleaner/remove-navigational-elements.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/cleaner/remove-navigational-elements.js b/lib/cleaner/remove-navigational-elements.js
index 7985ebf..74051b8 100644
--- a/lib/cleaner/remove-navigational-elements.js
+++ b/lib/cleaner/remove-navigational-elements.js
@@ -11,8 +11,9 @@ module.exports = function (rawHtml, host) {
 
   // Filter out 'back to top' links
   $('a').filter(function () {
+    var href = $(this).attr('href');
     var hasTopInText = $(this).text().toLowerCase().indexOf('top') > -1;
-    var hasHashInHref = $(this).attr('href').indexOf('#') > -1;
+    var hasHashInHref = href && href.indexOf('#') > -1;
     return hasTopInText && hasHashInHref;
   }).remove();
 
@@ -23,7 +24,7 @@ module.exports = function (rawHtml, host) {
 
     var isRelTag = relTag === 'tag';
     var isPartOfList = $(this).parents('ul').length > 0;
-    var containsUrlWithTag = href.indexOf(host) > -1 && href.indexOf('tag') > -1;
+    var containsUrlWithTag = href && href.indexOf(host) > -1 && href.indexOf('tag') > -1;
 
     if (isRelTag || containsUrlWithTag) {
       if (isPartOfList) {