如何将滚动条添加到 html 侧菜单

Question

如何添加仅用于左侧导航菜单的滚动条？我尝试添加溢出-y：滚动;在不同的地方，但这似乎没有奏效。我有点像网页设计的新手/新手，所以我从指南和模板中收集了各种技巧。任何提示将不胜感激。谢谢！

<ul class="navigation">
<li class="nav-item"><input type="type" placeholder="Search for a country..." name="search" id="search"> </form> </li>
<li class="nav-item"><a href="#">Home</a></li>
</ul>
<input type="checkbox" id="nav-trigger" class="nav-trigger"/>
<label for="nav-trigger"></label>
<div class="site-wrap">

这是我的一些 CSS

.navigation {
position: fixed;
background-color: rgb(230, 239, 252); 
text-align: left;
list-style: none;
width: 100%;
height: 10px;
top: 0;
right: 0;
bottom: 0;
left: 0;
z-index: 0;
}
/* Navigation Menu - List items */
.nav-item {
/* non-critical appearance styles */
width: 200px;
border-top: 1px solid #111;
border-bottom: 1px solid #000;
font-family:'Helvetica', 'Arial', 'Sans-Serif';
}
.nav-item a {
/* non-critical appearance styles */
display: block;
padding: 1em;
background: linear-gradient(135deg, rgba(216, 214, 214, 0) 0%,rgba(230, 229, 229, 0.65) 100%);
color: rgb(8, 8, 8);
font-size: 1.2em;
text-decoration: none;
transition: color 0.2s, background 0.5s;
}
.nav-item a:hover {
color: #333;
background: linear-gradient(135deg, rgba(0,0,0,0) 0%,rgba(12, 52, 126, 0.65) 100%);
}
.site-wrap {
min-width: 100%;
min-height: 100%;
background-color: rgb(230, 239, 252);
position: relative;
top: 0;
bottom: 100%;
left: 0;
z-index: 1;
padding: 4em;
}
.nav-trigger {
position: absolute;
clip: rect(0, 0, 0, 0);
}
label[for="nav-trigger"] {
position: fixed;
top: 15px;
left: 15px;
z-index: 2;    
width: 30px;
height: 30px;
cursor: pointer;
background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' version='1.1' x='0px' y='0px' width='30px' height='30px' viewBox='0 0 30 30' enable-background='new 0 0 30 30' xml:space='preserve'><rect width='30' height='6'/><rect y='24' width='30' height='6'/><rect y='12' width='30' height='6'/></svg>");
background-size: contain;
}
.nav-trigger + label, .site-wrap {
transition: left 0.2s;
}
.nav-trigger:checked + label {
left: 215px;
}
.nav-trigger:checked ~ .site-wrap {
left: 200px;
}
body {
overflow-x: hidden;
}

如果您需要查看更多代码片段，请告诉我。

Answer 1

您可以将此类添加到 css 中：

div.scroll { 
margin:4px, 4px; 
padding:4px; 
background-color: green; 
width: 500px; 
height: 110px; 
overflow-x: hidden; 
overflow-x: auto; 
text-align:justify; 
}

并将您的侧边菜单放入如下所示的div 中：

<div class="scroll">Your side menu here...</div>

您还可以查看以下链接以获取更多信息：https://www.geeksforgeeks.org/making-a-div-vertically-scrollable-using-css/