bug(material/select): mat-select option is not announced on the very first time options are visible
维护者通常 1 天内回复
还没有人认领这个 Issue。
评估
- 难度
- 3/5
- 预计耗时
- 1-2 天
- 新手友好度
- 67/100
- Issue 类型
- 缺陷
- 描述清晰度
- 描述清楚
- 活跃度
- 活跃
- 技术栈
- angular, typescript
调研方向
Start by reading the Angular Material mat-select implementation and its accessibility tests for announcing the active option when the panel opens. Reproduce the issue with the linked reactive-form example and a screen reader, then trace how the initially selected option is announced on open versus after navigating away and back. Done means the selected state is announced on the first open; add or update a regression test for that behavior.
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 a mat-select has an initial value (for example, set through a reactive form control) and the user opens it for the first time, the screen reader reads the active option's text but does not announce it as "selected". If the user moves to different options and returns back to the selected one, the same option is announced correctly as "selected".
Reproduction
StackBlitz link: https://stackblitz.com/edit/3j8yhubg?file=src%2Fexample%2Fselect-reactive-form-example.ts
Steps to reproduce:
- Create a mat-select bound to a reactive FormControl with an initial value:
- Turn on a screen reader (VoiceOver).
- Tab to the select and open it with Space, Enter or Alt+Down
- Listen to the announcement for the highlighted option.
- Go to next option.
- Return to previous option and listen to the announcement. "Selected" is announced for the option which is selected.
Expected Behavior
"Selected" should be announced on the very first time the panel of options open.
Actual Behavior
"Selected" is not announce on the very first time the panel opens and the user is on the selected item. It is announced when the user goes to some different options and returns to the selected item.
Environment
- Angular: 21.2.22
- CDK/Material: 21.2.14
- Browser(s): Chrome
- Operating System (e.g. Windows, macOS, Ubuntu): MacOS
- 主要语言
- TypeScript
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- 平均合并
- 2 天 7 小时
- 30 天内合并 PR
- 83
环境准备
- 没有 Dockerfile 或 Docker Compose 文件
- 没有 Pull Request 模板
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- 提交 Pull Request，并在描述里引用这个 Issue 编号。
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