Use hidden checkboxes and CSS's :checked pseudo-class combined with adjacent sibling selectors ( ) to control content display; 2. The HTML structure contains input, label and content div for each collapsed item; 3. Smooth expansion/collapse animations by setting max-height transition; 4. Add open/close status icons with pseudo-elements; 5. Use radio types to implement single-open mode, while checkbox allows multiple openings. This is an interactive foldable menu implementation that requires no JavaScript and is compatible with modern browsers.
Creating a CSS-only according to the menu is a great way to add interactive content without relying on JavaScript. It uses the :checked pseudo-class, hidden checkboxes, and the adjacent sibling selector ( ) to toggle content visibility. Here's how to build one step by step.
1. HTML Structure
Start with a clean HTML structure using checkboxes (or radio buttons) to control each according item. Each section includes a label (as the clickable header) and a content div.
<div class="accordion">
<div class="accordion-item">
<input type="checkbox" id="section1" name="accordion" />
<label for="section1">Section 1</label>
<div class="accordion-content">
<p>This is the content for section 1.</p>
</div>
</div>
<div class="accordion-item">
<input type="checkbox" id="section2" name="accordion" />
<label for="section2">Section 2</label>
<div class="accordion-content">
<p>This is the content for section 2.</p>
</div>
</div>
<div class="accordion-item">
<input type="checkbox" id="section3" name="accordion" />
<label for="section3">Section 3</label>
<div class="accordion-content">
<p>This is the content for section 3.</p>
</div>
</div>
</div>Use
type="radio"instead ofcheckboxif you want only one section open at a time.
2. Basic CSS Styling
Style the according to look clean and functional. Hide the checkbox inputs and style the labels as clickable headers.
.accordion {
width: 100%;
max-width: 600px;
margin: 0 auto;
font-family: Arial, sans-serif;
}
.accordion-item {
border-bottom: 1px solid #ddd;
}
.accordion-item label {
display: block;
padding: 15px;
background-color: #f5f5f5;
font-weight: bold;
cursor: pointer;
user-select: none;
transition: background-color 0.3s ease;
}
.accordion-item label:hover {
background-color: #e9e9e9;
}
.accordion-content {
max-height: 0;
overflow: hidden;
transition: max-height 0.3s ease-out, padding 0.3s ease;
padding: 0 15px;
background-color: #fff;
}
.accordion-content p {
margin: 10px 0;
}3. Toggle Content with CSS
Use the :checked selector and the (adjacent sibling) combiner to expand the content when the checkbox is checked.
#section1:checked label .accordion-content,
#section2:checked label .accordion-content,
#section3:checked label .accordion-content {
max-height: 200px;
padding: 15px;
}The
max-heighttrick allows smooth opening/closing. Set it high enough to fit your content, but not too high to avoid long animations.
4. Optional: Add Open/Close Icons
You can add a small arrow or plus/minus icon using pseudo-elements.
.accordion-item label::after {
content: ' ';
float: right;
}
#section1:checked label::after,
#section2:checked label::after,
#section3:checked label::after {
content: '?';
}This gives users a visual cue about the state of each section.
Key Points to Remember
- The checkbox must come before the label and content in the HTML for the sibling selector to work.
- Use
max-heightinstead ofdisplay: nonefor smooth transitions. - Radio inputs (
type="radio") allows only one open item at a time; checkboxes allow multiple open items. - Accessibility: Consider adding
aria-expandedandaria-controlsattributes if you enhance with minimal JS later.
Basically, it's a clever use of form inputs and CSS selectors to simulate interaction. No JavaScript required, and it works across all modern browsers.
The above is the detailed content of How to create a CSS-only accordion menu?. For more information, please follow other related articles on the PHP Chinese website!
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