Keyboard Accessibility

The principle and practice of ensuring that all functionality of a website, application, or digital interface can be accessed and operated using only a keyboard, without requiring a mouse, touchscreen, or other pointing device. Keyboard accessibility is foundational to web accessibility because many assistive technologies — including screen readers, switch devices, and sip-and-puff systems — interface with applications through keyboard commands. WCAG 2.1 Success Criterion 2.1.1 (Keyboard) requires that all functionality be operable through a keyboard interface, and Success Criterion 2.1.2 (No Keyboard Trap) requires that keyboard focus can always be moved away from any component. Common keyboard accessibility failures include missing focus indicators, interactive elements that only respond to mouse events, and focus traps in modal dialogs or embedded content.