Accessibility Snippets — Free HTML CSS JS Accessible ARIA UI Examples

These snippets treat accessibility as part of the component, not a pass afterwards: focus that moves and returns predictably, roles and states that match what the widget actually does, live regions that announce changes, visible focus indicators, and motion that can be switched off.

They follow the ARIA authoring practices for each pattern — dialogs, tabs, comboboxes, disclosures, alerts — so the markup is worth copying exactly rather than approximating.

The first rule of ARIA is not needing it

A native <button>, <dialog>, <details> or <input> arrives with correct role, state and keyboard behaviour built in, and no amount of ARIA fully replaces that. These snippets reach for ARIA roles and states only when building something the platform genuinely does not provide — and when they do, they implement the entire authoring-practice pattern for that role, because a role announced without the matching keyboard behaviour is worse for a screen-reader user than no role at all.

Focus has to go somewhere, and come back

Opening a dialog or drawer means deciding exactly where focus lands — usually the first focusable element or a heading — and trapping Tab so it cannot escape to content behind the overlay. Just as critical is what happens on close: focus returning to the exact trigger element that opened the interaction, rather than resetting to the top of the document, is what keeps a keyboard user oriented across repeated open-and-close cycles.

Live regions announce without stealing attention

Content that changes without a focus move — a result count updating, a toast appearing, a save confirming — needs an aria-live region to be noticed by a screen reader at all. These snippets default to aria-live="polite", which waits for a natural pause before announcing, and reserve assertive for genuine interruptions like a blocking error, because an assertive region firing constantly is experienced as being talked over.

Focus rings that show up when they matter

:focus-visible is what let designers stop removing focus outlines altogether: it shows a ring for keyboard and other non-pointer input while staying invisible on a mouse click, resolving the old conflict between "focus rings look messy on click" and "removing them breaks keyboard navigation entirely." Every custom-styled control in this tag keeps a real, high-contrast ring under :focus-visible rather than suppressing it for aesthetic reasons.