How to build accessible web applications — a practical frontend tutorial Accessibility is not a finishing touch; it is a core quality of the web. When you build with accessibility in mind from the start, you create interfaces that are usable, resilient, and often simpler. WCAG in Practice The Web Content Accessibility Guidelines (WCAG) organize requirements under four principles: Perceivable: Content can be seen or heard (e.g., text alternatives for images, captions for video). Operable: Interfaces work with different inputs (e.g., keyboard navigation). Understandable: Content and behavior are clear and predictable. Robust: Works across browsers and assistive technologies. Common targets: Level AA is the standard most teams aim for. Color contrast: at least $$4.5:1$$ for normal text, $$3:1$$ for large text. Provide text alternatives and clear focus states. Semantic HTML First Use native elements before adding ARIA. Browsers and assistive tech already understand them.…