bug(mat-select): Talkback cannot navigate long dropdowns
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 4/5
- 预计耗时
- 3-5 天
- 新手友好度
- 38/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 停滞
- 技术栈
- angular, typescript
调研方向
从 mat-select 和 mat-option 入口开始,使用一个很长的选项列表,在启用 TalkBack 的 Android Chrome 中重现该问题。完成标准是,向左/向右导航始终将焦点保持在预期元素上,避免 UI 大幅跳动或抖动,并持续明确显示获得焦点的选项。
由索引模型根据 Issue 内容生成。
描述
Is this a regression?
- Yes, this behavior used to work in the previous version
The previous version in which this bug was not present was
No response
Description
When navigating through a mat-select element using Talkback on an Android mobile device, dropdowns with many options cause the page to not maintain focus and result in major jittering and page UI issues. This is not the case with a list of small options. This may be partially a mat-option issue as well.
Reproduction
StackBlitz link:
Steps to reproduce:
- view page with Talkback on Android
- attempt to move through the list (note the jittering and incorrectly moving content)
Expected Behavior
Swiping left and right should provide consistent navigation without large UI jumps and page jittering. The element that is being focused should be indicated to the user.
Actual Behavior
Swipping left and right with standard mobile screen reader navigation on long dropdowns results in UI reloading errors and focus issues. Occasionally, the first or last few elements will function normally but issues occur at the midpoints of these lists.
Looking at other UIs that have a similar element the Multiple Search Selection "state" field here seems very good, UI focus is maintained and there are no large reloading jumps when navigating. Though this is an arbatray dropdown example, and I am sure there are other ones that could be identified.
Environment
- Angular: 21.0.6
- CDK/Material: 20.2.9
- Browser(s): Chrome
- Operating System (e.g. Windows, macOS, Ubuntu): Android
- 主要语言
- TypeScript
- 星标
- 25k
- 派生
- 6.8k
- 平均合并
- 1 天 5 小时
- 30 天内合并 PR
- 67
环境准备
- 没有 Dockerfile 或 Docker Compose 文件
- 没有 Pull Request 模板
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- Fork 仓库,在一个分支上完成修改。
- 提交 Pull Request,并在描述里引用这个 Issue 编号。
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