Perceivable
Provide text alternatives for non‑text content and ensure content is adaptable.
<img src="diagram.png" alt="Flow diagram of user onboarding">Introduction
Web accessibility ensures that everyone, including people with disabilities, can perceive, understand, navigate, and interact with the web.
Four Principles (POUR)
Operable
Make all functionality available from a keyboard and give users enough time to read.
button{
/* visible focus indicator */
outline: 2px solid var(--accent);
}Understandable
Use clear language, predictable navigation, and help users avoid and correct mistakes.
Robust
Ensure compatibility with current and future user agents, including assistive technologies.