From 2e9f1c5cb2ad0c74ddeeecf0afa533139464b54d Mon Sep 17 00:00:00 2001
From: amzrk2
Date: Wed, 3 Jun 2020 18:56:00 +0800
Subject: Fix null pointer error

---
 assets/js/fuji.js | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'assets/js')

diff --git a/assets/js/fuji.js b/assets/js/fuji.js
index 4fbd651..66892af 100644
--- a/assets/js/fuji.js
+++ b/assets/js/fuji.js
@@ -51,13 +51,18 @@ function updateUtterancesTheme(utterancesFrame) {
     }
 }
 
-// load comment
-document.querySelector('span.post-comment-notloaded').addEventListener('click', loadComment);
+// load comment button only when comment area exist
+if (document.querySelector('span.post-comment-notloaded')) {
+    document.querySelector('span.post-comment-notloaded').addEventListener('click', loadComment);
+}
 
 // remove empty ul in toc if article only have ## and ###
-if (document.querySelectorAll('.sidebar-toc ul ul').length > 0) {
-    document.querySelectorAll('.sidebar-toc ul ul').forEach((value, key, parent) => {
-        value.setAttribute('style', 'display: none;');
+var secondQueryOfToc = document.querySelectorAll('.sidebar-toc ul ul');
+if (secondQueryOfToc.length > 0) {
+    secondQueryOfToc.forEach((value, key, parent) => {
+        if (value.innerText === '') {
+            value.setAttribute('style', 'display: none;');
+        }
     });
 }
 
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