Web accessibility testing via keyboard navigation

A professional developer outlines the importance of using the Tab key as a primary tool for testing website accessibility. While automated tools like Lighthouse audits provide a baseline, manual keyboard navigation is essential to ensure a site is truly usable for those relying on assistive technologies.

Key areas for testing include focus styles and the reachability of interactive elements. Developers are advised to use CSS pseudo-classes such as :focus, :focus-within, or :focus-visible to ensure highlighted elements are clearly visible. Additionally, the use of semantic HTML is emphasized; developers should use proper elements like <button> or <a> instead of non-interactive elements like <div> to ensure links, buttons, and form controls are accessible to keyboard and screen reader users.