20+ Bootstrap Accordions

February 24, 2026 by Vladimir 5 min read

This collection provides a set of flexible solutions for content organization, ranging from simple FAQs to multi-level menus built on Bootstrap. Leveraging the Collapse plugin and data-bs-* attributes, the examples ensure robust interactivity and accessibility out of the box without extra scripts. Special attention is paid to customization: from the minimalist .accordion-flush variant to overriding SASS variables for unique branded designs. Furthermore, techniques for “always-open” behavior and nested structures are explored, allowing for efficient management of complex data.

Examples

Vertical timeline layout with alternating image cards and interactive Bootstrap accordions, featuring CSS scroll-driven reveal animations.

CSS Scroll-Animated Accordion Vertical Timeline

This is a Scroll-Animated Bootstrap Accordion Timeline. It structures sequential data into a central vertical axis, combining visual anchor points (images) with collapsible text modules (accordions). Its function is to compress dense historical or process-oriented information into a scannable format. Nodes remain hidden until scrolled into the viewport, forcing user focus on the active temporal step. (Requires: bootstrap, font-awesome)

Technologies:

HTML CSS

Difficulty: Intermediate

Browser Support (as of Feb 2026):

Chrome 115+

Edge 115+

Firefox 114+ (flag)

Safari 26+

Features:

Scroll-Driven Reveal Collapsible Content Alternating Layout Responsive Geometry

Code by:

Grzegorz Rogala

License: MIT

See the Pen CSS Scroll-Animated Accordion Vertical Timeline.

Bootstrap 5 Accordion Example

A customized Bootstrap 5 accordion that visually elevates the active panel using the modern :has() pseudo-class. By detecting the .accordion-button:not(.collapsed) state, it applies a bold border and hard shadow to the parent container, creating a distinct “pop-out” focus effect.

See the Pen Bootstrap 5 Accordion Example.