30+ CSS Accordions
Data density requires vertical control. Pure CSS Accordion Examples remove the friction of JavaScript initialization, allowing the interface to expand and collapse content natively. This collection provides structural blocks for modern UI design. Utilizing curated snippets eliminates bloated dependencies, keeping the logic transparent and fast.
Technically, these examples rely on the checkbox hack or the <details> and <summary> elements for native state management. The code utilizes Flexbox for precise alignment and grid-template-rows to animate container height — a performant alternative to manual pixel counting. Transitions leverage hardware acceleration, animating transform and opacity to ensure a 60fps frame rate without reflows. The HTML structure remains strictly semantic, maintaining high layout stability and fast rendering.
Every free demo is fully responsive and cross-browser compatible. Users can instantly download the raw code or fork an updated interaction on CodePen. These assets are strictly optimized for accessibility, delivering a fast, frictionless experience across all modern devices.
Examples
Smooth Accordion with Parallax Images
An advanced semantic accordion using native <details> elements synchronized with a parallax image gallery. Height transitions are made fluid through modern interpolate-size: allow-keywords and complex linear() bounce easings. JavaScript connects active toggles to external navigation buttons, aligning the active image block to match disclosure states. (Requires: gsap.js, tweakpane.js)
Chrome 129+
Edge 129+
Firefox 121+
Safari 17.2+
See the Pen Smooth Accordion with Parallax Images.
Expandable Wallet Payment Card
This is an Expandable Wallet Payment Card. It uses pure CSS to manage complex UI states without JavaScript. Its function is to conceal secondary actions — like selecting a payment method or adding funds — behind a compact primary view showing the balance. The interaction is self-contained, optimizing screen real estate while keeping critical functions one click away.
Chrome 105+
Edge 105+
Firefox 121+
Safari 15.4+
See the Pen Expandable Wallet Payment Card.
Apple-Style Smooth Animated Accordion
The Apple-Style Smooth Animated Accordion is a cutting-edge UI component that achieves high-end animation results without a single line of JavaScript. Inspired by the sleek marketing pages of Apple, it utilizes the newest CSS specifications to solve the age-old problem of animating to height: auto while maintaining full accessibility through semantic HTML.
Chrome 131+
Edge 131+
See the Pen Apple-Style Smooth Animated Accordion.
Pure CSS Animated Details Accordion
This Pure CSS Animated Details Accordion utilizes cutting-edge CSS functions to achieve smooth height transitions on native HTML elements without a single line of JavaScript. By leveraging the revolutionary calc-size() function and the ::details-content pseudo-element, it finally solves the age-old problem of animating from height: 0 to height: auto.
Chrome 129+
Edge 129+
See the Pen Pure CSS Animated Details Accordion.
Animated Grid Tracks with :has()
A pure CSS expanding gallery powered by the modern :has() selector. Hovering triggers a grid-template-columns transition, widening the active item while revealing content via opacity and transform animations, all styled with blend modes for a tinted monochrome aesthetic.
See the Pen Animated Grid Tracks with :has().
Expanding Cards
A vertical neumorphic accordion that uses CSS Flexbox transitions to dynamically expand content panels. JavaScript toggles the .active class, triggering a smooth flex-grow animation that enlarges the selected panel while revealing its detailed content via opacity transitions, creating a tactile and responsive settings interface.
See the Pen Expanding Cards.
FAQ Accordion
An effective pattern for an FAQ component in pure JS and CSS - a forEach loop ensures all inactive tabs are closed, while CSS, via the single .show-text class, atomically controls the answer’s visibility and the icon switch.
See the Pen FAQ Accordion.
Simple Image Accordion
An implementation of a responsive accordion using Flexbox, where the smooth expansion of sections is achieved by animating the CSS flex property. A vanilla JS script is used only to toggle the .accordion__item_active class on click.
See the Pen Simple Image Accordion.
CSS Accordion with Custom Animated Arrows
A pure CSS accordion based on native <details>/<summary> elements, where the standard marker is hidden, and a custom animated chevron arrow is created and controlled exclusively via clip-path: polygon() and the rotate property upon expansion.
See the Pen CSS Accordion with Custom Animated Arrows.
3D Parallax Navigation with 'Fisheye' Hover Effect (CSS-Only)
A stunning CSS-only 3D parallax navigation with a “fisheye” hover effect, achieved using transform-style: preserve-3d and a translateZ function tied to cursor position. The core mechanism is the mathematical calculation of CSS variables.
A pure‑CSS accordion driven by hidden checkboxes. Each list item contains a checkbox, an icon, and a text block; the :checked state toggles visibility by adjusting max-height and opacity. An entry animation is handled with keyframes. Minimal code, maximum functionality — no JavaScript.
A pure‑CSS accordion driven by hidden checkboxes. Each item holds a checkbox, an arrow icon, and a text block; the :checked state toggles the text visibility while the arrow animates its direction. Smooth transitions rely on transition. Entry animation of list items uses keyframes. No JavaScript — just semantic markup and styles.
The accordion uses hidden radio buttons and CSS transitions. Each section has a label and hidden content; when a radio is selected, the corresponding content expands via max-height change. The arrow rotates. Simple, reliable logic.
The accordion uses the CSS :target pseudo‑class — sections toggle via anchor links, no JavaScript needed. Each season contains embedded audio players with themed sounds. Styling relies on gradients and smooth transitions; the layout adapts to screen width.
