fix: the ToC shown on non-toc pages

layouts/partials/toc.html

@@ -1,10 +1,21 @@
-{{ $toc := and ($.Site.Params.toc) (ge .WordCount $.Site.Params.tocWordCount) }} {{ if isset .Params "toc" }} {{ $toc = .Params.toc }} {{ end }} {{ if $toc }}
+{{ $toc := and ($.Site.Params.toc) (ge .WordCount $.Site.Params.tocWordCount) }} 
-<details class="toc noselect">
+{{ if isset .Params "toc" }} 
-  <summary>Table of Contents</summary>
+  {{ $toc = .Params.toc }}
-  <div class="inner">{{ .TableOfContents }}</div>
+{{ end }} 
-</details>
+
+
+{{ if $toc }}
+  {{ $tocContent := .TableOfContents }}
+  {{ if findRE "<li>" $tocContent }}
+  <!-- we show the toc only if we have element in .TableOfContents -->
+  <details class="toc noselect">
+    <summary>Table of Contents</summary>
+    <div class="inner">{{ .TableOfContents }}</div>
+  </details>
+  {{ end }}
 {{ end }}
 
+
 <script>
   document.querySelector(".toc").addEventListener("click", function () {
     if (event.target.tagName !== "A") {

layouts/partials/toc.html.rej

@@ -0,0 +1,28 @@
+diff a/layouts/partials/toc.html b/layouts/partials/toc.html	(rejected hunks)
+@@ -1,10 +1,21 @@
+-{{ $toc := and ($.Site.Params.toc) (ge .WordCount $.Site.Params.tocWordCount) }} {{ if isset .Params "toc" }} {{ $toc = .Params.toc }} {{ end }} {{ if $toc }}
+-<details class="toc noselect">
+-  <summary>Table of Contents</summary>
+-  <div class="inner">{{ .TableOfContents }}</div>
+-</details>
++{{ $toc := and ($.Site.Params.toc) (ge .WordCount $.Site.Params.tocWordCount) }} 
++{{ if isset .Params "toc" }} 
++  {{ $toc = .Params.toc }}
++{{ end }} 
++
++
++{{ if $toc }}
++  {{ $tocContent := .TableOfContents }}
++  {{ if findRE "<li>" $tocContent }}
++  <!-- we show the toc only if we have element in .TableOfContents -->
++  <details class="toc noselect">
++    <summary>Table of Contents</summary>
++    <div class="inner">{{ .TableOfContents }}</div>
++  </details>
++  {{ end }}
+ {{ end }}
+ 
++
+ <script>
+   document.querySelector(".toc").addEventListener("click", function () {
+     if (event.target.tagName !== "A") {