MDN accessibility lessons: turn principles into working HTML

MDN's accessibility learning module connects web development techniques with accessible use. It covers topics such as semantic HTML, CSS and JavaScript behavior, assistive technology, multimedia and mobile experiences. It is useful for developers who understand basic web code and need to translate broad accessibility goals into implementation choices. Choose a lesson that matches a real component in your project. Recreate a small example, then apply the principle to your own interface and test it with a keyboard. For an archive, useful practice includes clear heading structure, descriptive links, labeled form controls and text alternatives that explain an image's role. Work through the exercises rather than only reading the examples. A tutorial demonstrates a principle, not every condition in a production application. Dynamic state, focus management and content changes can introduce problems after the initial markup works. Check the accompanying references and test the complete user flow. Avoid treating extra ARIA attributes as a substitute for using the correct native HTML element and understandable content.

Editorial review: 2026-09-23. New evidence may change this account.

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