Re: [csswg-drafts] [css-contain-2] Clarify whether content-visibility: auto subtree elements are visible in accessibility (#5857)

> If it was possible for us to provide a view into a partial document or a part of a document, with an annotation specifying that accessibility technology should request more of the document if it needs it, then that would solve the problem for sure.

We have been looking into this more general problem ([see this explainer in WICG](https://github.com/WICG/accessible-loading-and-searching-of-content/blob/main/explainer.md)) and have an [experimental implementation](https://groups.google.com/a/chromium.org/g/blink-dev/c/etQ-LVhY6S4/m/QXG4acPAAwAJ) in Chromium to expose this to ATs on Windows (behind a flag). We're currently working with the Narrator team in Windows to implement experimental support for this new property in order to explore the user experience in practice.

`content-visibility: auto` would then respond naturally to AT actions that cause it to scroll into (or close to) the viewport.

That being said, there probably is something to be said for `content-visibility: auto` working for AT users 'out of the box' without authors needing to add extra ARIA semantics to ensure content is fully accessible.

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Received on Wednesday, 24 March 2021 00:34:47 UTC