Accessible Web Components

• Smashing Magazine: A Complete Guide To Accessible Front-End Components
• aria-tree-walker: accessible navigation through trees, demo

AutocompleteSearch

• Considering dynamic search results and content

React-specific

• Reach UI: accessibility-focused primitives for React. Built by Ryan Florence, co-creator of React Router and Remix
• Headless UI: unstyled, fully accessible UI components for React and Vue by the Tailwind team
• Radix Primitives: unstyled, accessibility-focused components for React. This library has a very broad set of included components
• React ARIA: React hooks you can use to build accessible components from scratch