Expand / Collapse widget examples

This is a simple reveal region. It uses an accessible button that controls the hidden content with aria-expanded and aria-controls. The content here can include text, lists, images or any other markup.

• Accessible markup with aria attributes
• Smooth height animation using max-height
• Keyboard and pointer interactions supported by the button element

Highlights:

• Works with screen readers — aria-expanded and aria-hidden are kept in sync.
• Animated transitions for a smoother user experience.
• Progressive enhancement — if JavaScript is unavailable, the content remains visible when set open.

Example usage in code: <button aria-expanded> ... </button>