Expand/Collapse Widget Examples

This is a simple implementation using HTML, CSS, and JavaScript. The button toggles the visibility of the content section below it. The content is initially hidden (collapsed) and expands when the button is clicked, using CSS transitions for a smooth effect.

Accessibility features include ARIA attributes like aria-expanded and aria-controls to communicate the state and relationship to assistive technologies.

• Save screen space by hiding detailed content until needed.
• Improve user focus by presenting information progressively.
• Can enhance performance on content-heavy pages by reducing initial DOM size.
• When implemented accessibly, they are usable by everyone, including keyboard and screen reader users.

The widget uses a max-height CSS transition for the smooth open/close animation. The JavaScript toggles a CSS class to trigger the animation and updates the aria-expanded attribute.

For better accessibility, focus management is handled naturally by the button element, and the content area has a role="region" to denote a landmark when expanded.