Accordions exist because we never have enough space for everything we want to show.
The examples here prove something useful: you can build collapsible panels without touching JavaScript. Checkbox tricks and radio button states handle the expand/collapse behavior. Nothing fancy, just CSS doing what it does.
Here’s what makes pure CSS appealing (at least to me). Zero dependencies means zero headaches. Your accordion works whether JavaScript loads or not. The browser handles everything through native HTML elements and transitions.
I’m walking through accordion patterns that actually function. Basic toggles, nested sections, smooth animations. The code’s all here, plus notes on keeping things accessible and responsive.
FAQ sections are the obvious use case. But these work for product specs, mobile navigation, or anywhere you need content to expand on demand.
And your page stays light. No library bloat, no extra requests.
Worth noting: pure CSS accordions have limitations. Multiple open panels at once? Gets tricky. But for straightforward collapse/expand patterns, they’re solid.
The Best CSS Accordion Examples
CSS3 Accordion
By Wesley van Wyk
Most websites rarely use horizontal accordions, but this type of accordion makes an effective design component for displaying images, Q&A, and presenting guidelines. Horizontal accordions also function as an onboarding feature or a simple in-page information box.
This animated accordion allows you to get creative with pure CSS3. It uses a rotation transition when clicking on tabs.
CSS Accordion: Checkbox Hack
By Jon Yablonski
The CSS logic behind this fixed height checkbox accordion is similar to the radio button case, with the input type changed from radio to checkbox.
Bootstrap Accordion FAQ
By John Fink
This simple yet functional accordion was developed by John Fink via Bootstrap. This accordion makes an ideal design component for the website’s FAQ section, and it can also be utilized for other purposes.
The color of the text is black by default. It has a white background color for the answers, and light grey for the questions. Its color combination and thin border-style give the entire component a sleek, minimalist look.
Accordion Image Gallery
By Stefan C.
This animated accordion is perfect for those who plan to creatively display images on their websites. The gallery enlarges an image when you hover over it.
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Radio Inputs & Accordions 2
By Scott Earl
This radio accordion’s design is simple yet functional, which makes it easy to use on mobile devices. It has custom styled radio buttons that occupy an appropriate amount of space in the sliding menu.
If you opt to design a more streamlined accordion UI minus the complex JavaScript, this might be an ideal option for you.
Accordion Menu
By Benjamin
This Bootstrap accordion menu was developed for dashboard navigation. The design directs users to the right pages.
Pure HTML and CSS Accordion
By Chris Ota
This expandable accordion was developed by Chris Ota using pure HTML and CSS. It utilizes a checkbox input to toggle the movement of each accordion panel, and it has a unique overall design.
Bootstrap Accordion With Search Query Reference Guide
By Chris Lane Jones
This advanced Bootstrap accordion features a search box that displays sections of content that contain the term being searched. The search query is located before the collapsible panels. It allows users to open multiple panels simultaneously.
CSS Accordion: Radio Button Hack
By Jon Yablonski
This CSS only accordion utilizes the radio button hack. It is written in Sass, a CSS pre-processor. You may view the consolidated CSS file by clicking the “View Compiled” button.
CSS3 Accordion Slider
By Tayfun B.
CSS :hover pseudo-selector allows you to use and control hover style effects. This pure CSS3 accordion is easy to set up, and it offers simple and custom animation effects that make a great slideshow component for a home page. It enables users to display images with descriptive text in every panel.
Full Width Accordion Slider
By Eze Rangel
Full Width accordion slider is a hybrid between an accordion and a pure CSS full width slide. It features vibrant colors and swift transitions that definitely would draw people’s attention.
Bootstrap Accordion
By Evan Yamanishi
This Bootstrap accordion makes an ideal design component for displaying guides or chapters of an eBook. It opens only one tab at a time, and it allows users to include and animate additional elements such as icons.
Multi-Open Accordion
By Frank Ali
As the name implies, this accordion allows you to open multiple tabs at the same time. It relies solely on CSS3, and it utilizes a checkbox input type which enables users to select and open multiple panels simultaneously.
FAQs about CSS accordions
Can you create an accordion without JavaScript?
Yes. Pure CSS accordions use the checkbox hack or radio button method to control visibility. The input element’s checked state triggers CSS selectors that show or hide content panels. This approach works across browsers without requiring any scripting.
How do CSS transitions work in accordions?
CSS transitions animate property changes over time. Set max-height from 0 to a specific value, add transition duration, and the panel expands smoothly. Combine with opacity changes for polished effects. Use ease-in-out timing functions for natural motion.
What’s the checkbox hack for accordions?
Hide a checkbox input, connect it to a label that acts as your accordion header, then use the :checked pseudo-class to target sibling content. When users click the label, it toggles the checkbox state and your CSS rules show or hide the panel.
Are CSS-only accordions accessible?
They can be, but need extra work. Add proper ARIA attributes, ensure keyboard navigation functions correctly, and include focus indicators. Screen readers struggle with pure CSS patterns unless you explicitly mark up the accordion structure with semantic HTML and accessibility features.
How do you create nested accordions?
Stack accordion structures inside content panels. Each level needs its own input-label pair. Keep specificity manageable by using unique IDs or classes for each nesting level. Watch for z-index conflicts when panels overlap during animation sequences.
What’s better for accordions: max-height or height?
Max-height wins for transitions because height: auto doesn’t animate. Set max-height to a value larger than your content will ever be. The downside? If you set it too high, closing animations look weird as they collapse empty space first.
Can multiple accordion panels stay open simultaneously?
With checkboxes, yes. Each panel operates independently. Want only one open at a time? Switch to radio buttons with the same name attribute. Radio buttons force mutual exclusivity, automatically closing other panels when a new one opens.
How do you style accordion icons that rotate?
Target the label’s pseudo-element or child icon, then use CSS transform with rotate(). The :checked selector changes rotation from 0deg to 180deg (or 90deg for chevrons). Add transition to the transform property for smooth rotation during state changes.
Do CSS accordions work on mobile devices?
Absolutely. They’re actually perfect for mobile since they save vertical space. Ensure touch targets meet minimum size requirements (44×44 pixels), test hover states translate to taps properly, and verify responsive design works across different screen widths.
What are common CSS accordion performance issues?
Animating too many properties simultaneously causes jank. Stick to transform and opacity for smooth 60fps animations. Avoid transitioning properties that trigger layout recalculations. Large max-height values create sluggish closing animations as the browser calculates intermediate steps through empty space.
Conclusion
CSS accordion examples demonstrate that effective collapsible panels don’t require heavy JavaScript frameworks.
The checkbox hack and radio button techniques give you functional expandable sections with minimal code overhead. Sure, they have limitations compared to scripted solutions, but for straightforward use cases like FAQ sections or product specifications, pure CSS handles the job.
Accessibility remains the trickiest part. You need proper ARIA attributes, keyboard navigation support, and focus management to make these patterns work for everyone.
Performance stays solid since you’re only animating transform and opacity properties. Avoid the temptation to transition everything at once.
Start with basic toggle content functionality, then layer in smooth transitions and hover effects as needed. Test across devices because touch interactions behave differently than mouse clicks.
The code samples here give you working foundations. Customize the styling, adjust timing functions, and adapt the structure to match your specific content organization needs.
If you liked this article with CSS accordion examples, you should check out this one with CSS timeline examples.
We also wrote about similar topics like CSS gallery examples, HTML calendar snippets, CSS input text examples, CSS animation examples, CSS animated background, and styling radio buttons.
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