Expand / Collapse Widget Demo

HTML stands for HyperText Markup Language. It is the standard markup language used to create and structure sections, paragraphs, links, images, and other content for web pages.

Key features include semantic elements, attributes, and a tree-like structure that browsers render into interactive pages.

• Defines the document structure
• Works with CSS and JavaScript to create rich experiences
• Accessible by assistive technologies when well-structured

Accessible toggles help users of all abilities understand and control what content is visible. Proper ARIA attributes convey state to assistive technologies.

Examples of good practices include descriptive button text, immediate focus on interaction, and predictable keyboard behavior.

This widget demonstrates independent expand/collapse behavior. Each section can be opened or closed without affecting others.

Try expanding more than one item to see how the layout adapts while maintaining clear, accessible controls.