Expand/Collapse Widgets

HTML (HyperText Markup Language) is the standard markup language used to create web pages. It provides the structure and content of websites.

Key Features:
  • Defines page structure with tags
  • Works with CSS for styling
  • Works with JavaScript for interactivity
  • Platform independent

CSS (Cascading Style Sheets) is used to style and layout web pages. Here are some useful tips:

Best Practices:
  • Use semantic class names
  • Organize styles logically
  • Minimize use of !important
  • Use flexbox or grid for layouts
  • Test across different browsers

JavaScript enables interactive behavior on web pages. Events are actions that occur in the browser.

Common Events:
  • click - User clicks an element
  • mouseover - Mouse moves over element
  • keydown - User presses a key
  • submit - Form is submitted
  • load - Page finishes loading

This expand/collapse widget includes several accessibility features to ensure usability for all users:

Implemented Features:
  • aria-expanded attribute for screen readers
  • Keyboard navigation support
  • Clear visual feedback on interactions
  • High contrast colors for readability
  • Proper semantic HTML structure