Expand / Collapse Widget Showcase

Native <details> Element

What is an expand/collapse widget?

An expand/collapse widget allows sections of content to be revealed or hidden, saving space and letting readers focus on what interests them most.

Native implementations like the HTML <details> element automatically handle keyboard and accessibility behaviors.

Click or press Enter/Space on the summary to toggle.
Use them for FAQs, Glossaries, and advanced options.
Style with CSS for custom indicators and animations.

Custom Expand/Collapse with Button Control