Expand/Collapse Widget Demo

HTML stands for HyperText Markup Language. It is the standard markup language used to create the structure and content of webpages. HTML elements form the building blocks of all websites, such as headings, paragraphs, links, images, and lists.

Tip: Use semantic HTML to improve accessibility and SEO.

Accessible content uses clear language, descriptive headings, and meaningful landmarks. Provide text alternatives for non-text content, ensure keyboard navigation works, and use appropriate ARIA roles where necessary.

• Keep interactive elements reachable via keyboard
• Provide enough color contrast for readability
• Use descriptive link text rather than generic phrases

This widget demonstrates a simple expand/collapse interaction. The button controls the visibility of the content container labeled by the panel's id. The container has the class "details" as requested.

You can add more widgets by duplicating the structure above and changing ids accordingly.