Web Development Beginner

What is Web Accessibility (a11y)?

The practice of designing websites that can be used by people with disabilities, following WCAG guidelines.

Web accessibility ensures websites are usable by everyone, including people with visual, auditory, motor, and cognitive disabilities. WCAG (Web Content Accessibility Guidelines) defines standards at levels A, AA (common target), and AAA.

Key practices include semantic HTML, alt text for images, keyboard navigation, sufficient color contrast, ARIA attributes, screen reader compatibility, and captions for media. Accessibility also benefits SEO and general usability.

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Related Terms

API (Application Programming Interface)

A set of rules and protocols that allows different software applications to communicate and exchange data.

A widely-used server-side scripting language designed for web development that powers over 75% of websites including WordPress.

A JavaScript file that runs in the background, enabling offline support, push notifications, and background sync for web apps.

A small piece of data stored in the browser by a website to remember user preferences, login state, or tracking information.

A communication protocol that enables full-duplex, real-time data exchange between a browser and server over a single connection.

An HTML element that tells search engines which URL is the preferred version of a page when duplicate or similar content exists at multiple URLs.

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