Expand/Collapse Widget Demo

HTML (HyperText Markup Language) is the standard markup language used to create web pages. It provides the structure and content of websites by using a system of tags and elements that tell web browsers how to display text, images, links, and other media.

CSS (Cascading Style Sheets) is used to style and layout web pages—for example, to alter the font, color, size, and spacing of your content, split it into multiple columns, or add animations and other decorative features. It works alongside HTML to create beautiful and responsive designs.

JavaScript is a versatile programming language that enables interactive web pages. It can update content, control multimedia, animate images, and much more. JavaScript is essential for creating dynamic, interactive experiences in modern web applications and can run in browsers and on servers.

Expand/collapse widgets (also called accordions or collapsible sections) work by toggling the visibility of content. When you click the toggle button, JavaScript adds or removes a class that controls the display state. CSS transitions create a smooth animation effect. This helps organize large amounts of information in a space-efficient manner.