Expand/Collapse Widget Showcase

Explore multiple implementations of expand/collapse interactions, built with semantic HTML, accessible controls, and progressive enhancement.

Native Details Element

What is a <details> element?

The <details> element provides a built-in expand/collapse experience with minimal JavaScript and full keyboard support.

  • It is focusable using the Tab key.
  • Space and Enter toggle the open state.
  • Assistive technologies announce the component as expandable.
Tip: pair it with a descriptive <summary> for better accessibility.
Why add custom styling?

Adapters like pseudo-elements create consistent disclosure indicators while preserving native semantics.

Styling offers brand alignment without sacrificing usability.

Button-Controlled Panel