Expand/Collapse Widgets

Use expand/collapse widgets to progressively disclose information, keeping your interface approachable.

This section covers the basics of how the widget works and why it helps maintain focus on the most important tasks.

• Declutters the layout.
• Improves scannability.
• Offers optional depth on demand.

Quick start

1. Identify the content that can be deferred.
2. Label the trigger button clearly.
3. Ensure the interaction is keyboard accessible.
4. Announce the state for assistive technologies via aria-expanded.

Once configured, test across devices to verify smooth animation and readability.

Can I nest widgets?
Yes, but be mindful of complexity. Provide clear hierarchy.

Is this accessible?
Use semantic controls, manage focus, and update ARIA attributes like in this demo.

How do I add animations?
The CSS in this example uses grid row transitions for smooth expansion without hard-coded heights.