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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WebAssembly (Wasm)

A binary instruction format that enables near-native performance execution of code in web browsers alongside JavaScript.

Responsive Design

A web design approach that makes web pages render well on all screen sizes using flexible layouts and media queries.

Progressive Enhancement

A web design strategy that starts with basic functionality for all browsers and progressively adds advanced features for capable ones.

HTML elements in the page head that provide metadata about the document for browsers, search engines, and social media platforms.

A typed superset of JavaScript that adds static type checking, interfaces, and advanced IDE support to JavaScript development.

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Techniques for storing copies of web resources at various levels to reduce server load, bandwidth, and response times.

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