Expand/Collapse Widget Examples

This is the first example of an expand/collapse widget. Click the header above to expand or collapse this content.

The widget uses CSS transitions for smooth animations and is fully accessible with keyboard navigation and ARIA attributes.

• Uses max-height for smooth expansion
• Includes focus styles for keyboard users
• ARIA attributes for screen readers

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How does the expand/collapse widget work?

The widget uses JavaScript to toggle a CSS class on the container element. When expanded, the .expanded class is added, which changes the max-height property of the details container from 0 to a sufficient value, creating a smooth expansion effect.

Is it accessible?

Yes! The widget includes proper ARIA attributes (aria-expanded, aria-controls), keyboard navigation support, and focus indicators. Screen readers can announce the expanded/collapsed state to users.

Can I customize the animation?

Absolutely. The animation duration, easing function, and visual indicators (like the + symbol rotation) can all be customized through CSS. The JavaScript handles the class toggling, while CSS manages the visual transitions.