Try out focusgroup and comment on the proposal.

Chrome's platform is a leading web browser developed by Google, offering insights into web standards, browser features, and web development tools. Through documentation, developer tools, and webinars, Chrome provides insights into building modern web applications and optimizing performance. Developers can learn about web APIs, progressive web apps (PWAs), and Chrome DevTools to create fast, secure, and user-friendly web experiences.

Chrome Developers

The `focusgroup` HTML attribute is a proposed declarative API that replaces manual roving-tabindex JavaScript for composite widgets like toolbars, tablists, menus, and listboxes. A single attribute handles arrow-key navigation, single Tab stop management, last-focused memory, writing mode/RTL support, and ARIA role inference automatically. The API accepts behavior tokens (toolbar, tablist, radiogroup, listbox, menu, menubar) plus optional modifiers (inline, block, wrap, nomemory). It supports nested focusgroups, shadow DOM, deep descendant discovery, and integrates with the CSS reading-flow property. Currently available behind a flag in Chromium browsers and via an origin trial, the Chrome team is requesting developer feedback on the API shape before it ships.

Request for developer feedback: focusgroup