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Expand/Collapse Widget Examples

Demonstrations of accessible expand/collapse patterns.

Native HTML Details/Summary

Uses the semantic <details> and <summary> elements.

What is HTML?

HTML (HyperText Markup Language) is the standard markup language for creating web pages. It provides the structure and content of web documents, while CSS handles styling and JavaScript provides interactivity.

Custom Button-Based Expander

Uses a button with aria-expanded and aria-controls for custom styling and behavior.

Accessibility ensures that websites and applications are usable by everyone, including people with disabilities. It benefits all users by improving usability, performance, and user experience. Accessible design is also often required by law in many jurisdictions.

Multiple Expandable Sections

Multiple details elements that can be expanded independently.

CSS Basics

CSS (Cascading Style Sheets) is used to style HTML elements. It controls colors, layouts, fonts, spacing, and more. CSS can be applied inline, internally, or through external stylesheets.

JavaScript Features

JavaScript is a programming language that enables interactive web applications. It can manipulate the DOM, handle user events, make network requests, and create dynamic user experiences.

Responsive Design

Responsive design ensures websites work well on devices of all sizes. Using media queries, flexible layouts, and scalable images, responsive design provides optimal viewing experiences across smartphones, tablets, and desktops.

Pre-Expanded Custom Widget

A custom expander that starts in the expanded state.

To start learning web development, begin with the fundamentals: HTML for structure, CSS for styling, and JavaScript for interactivity. Practice by building small projects, use version control with Git, and continuously learn new tools and frameworks as you progress in your career.