[Beta] Inaccessible UI Components

Accordion a11y issues

• When an Accordion trigger is focused, pressing down/up should focus the next/previous trigger.
• When an Accordion trigger is focused, pressing space should expand/contract its panel.
• The Accordion trigger should be a <button> rather than a <a>.
• The Accordion trigger should be wrapped in a h tag.
• The Accordion trigger should have an aria-expanded attr set to true when open.
• The Accordion trigger should have an aria-controls attr.

The same goes for the Tabs component (found in the sidebar and on code blocks), it fails a11y in many ways. I'd suggest you look at UI libs like Radix or ReachUI which provide high-quality, accessible UI components.

首先定位侧边栏和代码块中使用的 Accordion 和 Tabs 组件，然后将它们的行为与 issue 中链接的 Radix 和 ReachUI 参考进行比较。对于这两个组件，完成所列出的键盘交互以及 button、heading、aria-expanded 和 aria-controls 要求后，即可视为完成。