feat: accessibility improvements

[jon-cullison]

Implements 2/3 of the proposed changes here: https://github.com/ant-design/ant-design/issues/53203

I did not implement the panel role change because there is already some logic around setting the panel role to "tabpanel" when in accordion mode, and the panel role = "region" is optional for a11y purposes.

• Adds optional headingLevel prop which will wrap the collapse header in a header element
• Adds a default id generated by uuid to the collapse which will be used to create ids for the child components in order to link the header and panel.
• Adds optional id prop which will override the default id mentioned above

Summary by CodeRabbit

• Style

  • 优化折叠组件头部样式，确保标准与禁用状态下显示统一。

• 新功能

  • 引入自动生成唯一标识符功能，支持自定义 ID，提升组件稳定性与无障碍体验。
  • 增加了设置标题层级的选项，使显示层次更灵活友好。
  • 折叠面板头部增加 ARIA 角色与属性，增强无障碍支持。

• Tests

  • 扩展了测试覆盖，验证 ID 与标题层级功能的正确性，从而提升了整体可靠性。

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
collapse	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jun 27, 2025 1:51pm

[coderabbitai[bot]]

Walkthrough

此次变更主要包含对 Collapse 组件及其子组件（Panel、PanelContent）的增强改造，同时对样式文件和测试用例进行了相应更新。CSS 中扩展了 header 的选择器以支持包裹结构；组件中新增了通过 useId 自动生成 id 的逻辑，并引入了 headingLevel 属性用于辅助设置无障碍相关属性；接口定义中添加了新的 HeadingLevelType 类型；测试用例也更新以覆盖新增 id 与 headingLevel 的功能。

Changes

文件(s)	变更摘要
assets/index.less	扩展 header 选择器，新增 @{prefixCls}-header-wrapper > .@{prefixCls}-header 样式，统一应用常规及禁用状态下的样式。
src/Collapse.tsx src/Panel.tsx src/PanelContent.tsx src/hooks/…/useItems.tsx	在组件中新增 id 自动生成（基于 useId）和 headingLevel 属性，更新属性传递及无障碍相关的 aria 属性设置。
src/interface.ts	新增 HeadingLevelType 类型（1~6），并在 CollapseProps 与 CollapsePanelProps 中添加 headingLevel 和（CollapseProps 的）id 属性。
tests/index.spec.tsx	更新测试用例，新增针对 id 与 headingLevel 的测试，并重构部分测试逻辑以提升可读性。

Sequence Diagram(s)

sequenceDiagram
    participant U as 用户
    participant C as Collapse组件
    participant H as useItems钩子
    participant P as Panel组件
    participant W as HeaderWrapper

    U->>C: 请求渲染 Collapse
    C->>C: 检查是否提供 id（无则使用 useId 生成）
    C->>H: 传递 id 与 headingLevel
    H->>P: 将 id（可能附加索引）和 headingLevel 传给各 Panel
    P->>W: 根据 headingLevel 包装 header
    W-->>P: 返回处理后的 header

Possibly related PRs

• react-component/collapse#353: 该 PR 同样涉及 CollapsePanel 组件头部的无障碍属性调整，主 PR 增加了包裹 div 和 headingLevel，而该 PR 调整了 header 的 role 属性，两者均为提升头部无障碍体验相关。
• react-component/collapse#354: 该 PR 也对 CollapsePanel 组件的无障碍属性和事件处理进行了调整，虽聚焦点不同，但与本次改动在代码层面存在关联。

Poem

我是一只快乐的小兔子，
在代码森林里欢快奔跑，
ID 与标题层级轻轻织就，
无障碍世界更加美妙，
修改微小如花开一瞬，
让每行代码闪耀着光芒！
🥕 跟我一同庆祝这新希望！

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🚧 Files skipped from review as they are similar to previous changes (3)

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[jon-cullison]

@yoyo837 I removed the uuid package, ready for re-review.

[afc163]

Trace #362

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[afc163]

Would be conflicted with https://github.com/react-component/collapse/pull/362

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 99.16%. Comparing base (129f11f) to head (dbad27a). Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #363      +/-   ##
==========================================
+ Coverage   99.15%   99.16%   +0.01%     
==========================================
  Files           5        5              
  Lines         118      120       +2     
  Branches       43       44       +1     
==========================================
+ Hits          117      119       +2     
  Misses          1        1              

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