commit 645f1e7bff98e6c755c7a14a43e0a623f321d35f
Author: davidChan3000 <chengdawei3000@163.com>
Date:   Thu Jun 16 18:14:24 2022 +0800

    feat: optimize left menu usage (#2094)

diff --git a/docs/static/css/theme-white.css b/docs/static/css/theme-white.css
index bb7d903fa..cb255e6ad 100644
--- a/docs/static/css/theme-white.css
+++ b/docs/static/css/theme-white.css
@@ -64,6 +64,10 @@ header .select-style select{
     z-index: 2;
 }
 
+#sidebar .leftMenu{
+    overflow-y: auto;
+}
+
 #header-wrapper{
     position:sticky;
     background-color: #fff;
@@ -457,6 +461,7 @@ table td,p,code{
         left:-300px;
         width: 300px;
         padding-left: 16px;
+        background-color: #fff;
     }
 
     .sidebar-hidden #body{
@@ -474,6 +479,22 @@ table td,p,code{
     }
     .icon-3,.icon-2,.icon-1{display: none;}
 
+    .retro-theme #sidebar{
+        background-color: #F2EFDD;
+    }
+    .eyehelp-theme #sidebar{
+        background-color: #C7EBC9;
+    }
+    .haitian-theme #sidebar{
+        background-color: #E5EDFF;
+    }
+    .deep-theme #sidebar{
+        background-color: #15202F;
+    }
+    .dark-theme #sidebar{
+        background-color: #171717;
+    }
+
 }
 
 @keyframes mymove {
diff --git a/docs/themes/hugo-theme-learn/layouts/partials/menu.html b/docs/themes/hugo-theme-learn/layouts/partials/menu.html
index 79d2badd6..4341544b5 100644
--- a/docs/themes/hugo-theme-learn/layouts/partials/menu.html
+++ b/docs/themes/hugo-theme-learn/layouts/partials/menu.html
@@ -12,6 +12,7 @@
   </div>
 
     <div class="highlightable">
+    <div class="leftMenu">
     <ul class="topics">
 
         {{if eq .Site.Params.ordersectionsby "title"}}  
@@ -38,7 +39,7 @@
         </ul>
       </section>
     {{end}}
-
+  </div>
     <!-- {{ if or .Site.IsMultiLingual $showvisitedlinks }}
     <section id="prefooter">
       <hr/>
diff --git a/docs/themes/hugo-theme-learn/static/js/learn.js b/docs/themes/hugo-theme-learn/static/js/learn.js
index 976300675..7a7401117 100644
--- a/docs/themes/hugo-theme-learn/static/js/learn.js
+++ b/docs/themes/hugo-theme-learn/static/js/learn.js
@@ -26,8 +26,8 @@ function getScrollBarWidth() {
 };
 
 function setMenuHeight() {
-    $('#sidebar .highlightable').height($('#sidebar').innerHeight() - $('#header-wrapper').height() - 40);
-    $('#sidebar .highlightable').perfectScrollbar('update');
+    $('#sidebar .leftMenu').height($(window).innerHeight() - $('#header-wrapper').height() - 240);
+    $('#sidebar .leftMenu').perfectScrollbar('update');
 }
 
 function fallbackMessage(action) {
@@ -49,7 +49,7 @@ function fallbackMessage(action) {
 
 // for the window resize
 $(window).resize(function() {
-    // setMenuHeight();
+    setMenuHeight();
 });
 
 // debouncing function from John Hann
@@ -91,7 +91,7 @@ jQuery(document).ready(function() {
 
     var sidebarStatus = searchStatus = 'open';
     $('#sidebar .highlightable').perfectScrollbar();
-    // setMenuHeight();
+    setMenuHeight();
 
     jQuery('#overlay').on('click', function() {
         jQuery(document.body).toggleClass('sidebar-hidden');