Accessibility tree

[xfq]

From #162:

Is it possible to expose an accessibility tree for accessibility APIs to provide a representation that can be understood by assistive technologies (such as screen readers)? Can developers use JavaScript to modify the accessibility tree in a MiniApp?

[xfq]

It seems that at least some MiniApp implementations support adding attributes that can be used to provide additional semantics and improve accessibility:

• https://developers.weixin.qq.com/miniprogram/dev/component/aria-component.html
• https://q.qq.com/wiki/develop/miniprogram/component/accessibility.html
• https://opendocs.alipay.com/mini/component/accessibility
• https://doc.quickapp.cn/widgets/common-attributes.html#%E5%B8%B8%E8%A7%84%E5%B1%9E%E6%80%A7

[xfq]

Related discussions: https://www.w3.org/2021/05/20-MiniApp-minutes.html#t03

[zhangyongjing]

We can for sure define a common set of a11y attributes for UI components based on the reference implementations as listed above. For this we need to start the UI component spec first (In CG?).