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Priming live regions

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From: Mark Magennis
Date: Nov 6, 2023 1:58AM

I'm finding that when a <span aria-live="polite"> is created dynamically it isn't being read by JAWS in Chrome but it is read by MacOS VoiceOver in Chrome. I've always believed that for aria-live to work the element has to exist in the DOM on page load, but this doesn't appear to be the case for VoiceOver which seems to be able to detect the addition.

Now I'm wondering why JAWS doesn't do the same. Is it that it simply can't do this? Is there something to do with VoiceOver being more tightly integrated into MacOS that makes this possible and which can't be replicated in Windows screen readers?

Mark