Two examples: a simple toggle and an accordion-style panel group. The collapsible content uses the class "details". Each widget wrapper uses the class "example".
HTML (HyperText Markup Language) is the standard language for creating web pages. It provides the basic structure of a webpage using elements and tags.
Click the header again to collapse.
CSS (Cascading Style Sheets) describes how HTML elements are to be displayed on screen, on paper, or in other media.
JavaScript adds interactivity and dynamic behavior to web pages, enabling features like animations, form validation, and asynchronous requests.
Accessibility is designing products to be usable by people with a wide range of abilities. It includes proper semantics, keyboard support, and readable content.