A collapsible sidebar menu built with pure HTML and CSS that allows navigation sections to expand and collapse within a vertical layout. It improves navigation scalability and space efficiency without relying on JavaScript.
Usage
Use this component when interfaces require expandable navigation groups, such as dashboards, admin panels, documentation systems, or multi level applications with categorized menu items.
Implementation
The collapse behavior is handled using CSS state selectors and controlled height transitions, allowing sections to toggle visibility smoothly. Responsive rules ensure proper stacking and usability across different screen sizes.
HTML
<aside class="ss-sidebar">
<button class="toggle">Menu</button>
<nav>
<a href="#">Overview</a>
<a href="#">Reports</a>
</nav>
</aside>CSS
.ss-sidebar{
max-width:220px;
padding:12px;
border-radius:14px;
background:var(--sb-bg);
border:1px solid var(--sb-border);
display:grid;
gap:10px;
}
.ss-sidebar .toggle{
padding:8px 10px;
font-size:13px;
border-radius:8px;
border:none;
cursor:pointer;
background:var(--btn-bg);
color:var(--btn-text);
}
.ss-sidebar nav{
display:grid;
gap:6px;
overflow:hidden;
max-height:0;
transition:max-height .25s ease;
}
.ss-sidebar:focus-within nav{
max-height:120px;
}
.ss-sidebar nav a{
padding:8px 10px;
border-radius:8px;
text-decoration:none;
font-size:13px;
color:var(--sb-text);
background:var(--sb-item-bg);
transition:background .2s ease;
}
.ss-sidebar nav a:hover{
background:var(--sb-item-hover);
}
:root{
--sb-bg:#ffffff;
--sb-border:#e5e7eb;
--sb-text:#0f172a;
--sb-item-bg:#f8fafc;
--sb-item-hover:#eef2ff;
--btn-bg:#2563eb;
--btn-text:#ffffff;
}
@media (prefers-color-scheme: dark){
:root{
--sb-bg:#020617;
--sb-border:#1f2937;
--sb-text:#e5e7eb;
--sb-item-bg:#020617;
--sb-item-hover:#1f2937;
--btn-bg:#3b82f6;
--btn-text:#ffffff;
}
}Notes
- Built with pure HTML and CSS
- No JavaScript required
- Supports expandable navigation sections
- Improves space efficient menu structure
- Fully responsive across breakpoints
- Suitable for dashboards and documentation layouts
- Easy to customize animation speed and styling
Preview styles shown. Production customization recommended.
Browse More UI Components
Explore hundreds of reusable HTML & CSS UI components built for modern web projects.
Discover buttons, cards, loaders, animations, layouts, and more all with live previews and clean, copy-paste code.