A accessible tab container element with keyboard support. Follows the ARIA best practices guide on tabs.

$ npm install @github/tab-container-element

import '@github/tab-container-element'

<tab-container>
  <div role="tablist">
    <button type="button" role="tab" aria-selected="true">Tab one</button>
    <button type="button" role="tab">Tab two</button>
    <button type="button" role="tab">Tab three</button>
  </div>
  <div role="tabpanel">
    Panel 1
  </div>
  <div role="tabpanel" hidden>
    Panel 2
  </div>
  <div role="tabpanel" hidden>
    Panel 3
  </div>
</tab-container>

• tab-container-change (bubbles, cancelable): fired on <tab-container> before a new tab is selected and visibility is updated. event.detail.relatedTarget is the tab panel that will be selected if the event isn't cancelled.
• tab-container-changed (bubbles): fired on <tab-container> after a new tab is selected and visibility is updated. event.detail.relatedTarget is the newly visible tab panel.

Browsers without native custom element support require a polyfill.

• Chrome
• Firefox
• Safari
• Microsoft Edge

npm install
npm test

Distributed under the MIT license. See LICENSE for details.