Expand/Collapse Widget Demo

An expand/collapse widget is a user interface component that allows users to show or hide content by clicking a button or header. It helps organize information in a compact way, improving readability and user experience.

This pattern offers several advantages:

• Saves screen space by hiding secondary information
• Reduces cognitive load by presenting information progressively
• Improves navigation in content-heavy pages
• Enhances mobile user experience

Expand/collapse widgets are commonly used in:

• FAQs: Frequently asked questions sections
• Accordions: Multi-section content panels
• Menus: Navigation dropdowns
• Forms: Progressive disclosure of form fields
• Product details: Technical specifications and descriptions

This widget is implemented using pure HTML, CSS, and JavaScript. The key features include:

• Smooth CSS transitions for opening and closing
• Rotating arrow icon to indicate state
• Accessible button controls
• Responsive design that works on all devices

The details container uses CSS classes to manage its expanded and collapsed states.