Testing aria hidden

Notes:

This is a refresh of @stevefaulkner's aria-hidden tests and test data from 2013. Added a couple of new tests for visibility:hidden, and one new test for aria-hidden=false on descendant of aria-hidden=true.

Test cases used for testing:

https://carmacleod.github.io/playground/aria-hidden-tests.html

Software used for testing:

• Windows 10
• Chrome 81
• Edge 81
• Firefox 76
• Internet Explorer 11
• Safari 13.1
• JAWS 2019
• NVDA 2019.3.1
• VoiceOver on iOS 13.3.1 (iPhone SE)
• VoiceOver on macOS Catalina 10.15.4
• ChromeVox on Chrome OS ?
• Orca ? on Epiphany (Webkit) ?
• Orca ? on Chromium ? Ubuntu ?
• Orca ? on Firefox ? Ubuntu ?
• Talkback ? on Android ? Chrome ?
• Talkback ? on Android ? Firefox ?

Results:

screen reader support for various methods of hiding content

test	JAWS + Chrome	JAWS + Edge	JAWS + Firefox	JAWS + IE	NVDA + Chrome	NVDA + Edge	NVDA + Firefox	NVDA + IE	VoiceOver macOS + Safari	VoiceOver iOS + Safari	ChromeVox + Chrome OS	Orca + Epiphany (Webkit)	Orca + Chromium Ubuntu	Orca + Firefox Ubuntu	Talkback + Android Chrome	Talkback + Android Firefox
1. aria-hidden=true	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
2. html hidden	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
3. CSS display:none	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
4. CSS visibility:hidden	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
5. CSS off screen	read	read	read	read	read	read	read	read	read	read	?	?	?	?	?	?
6. CSS off screen aria-hidden=true	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
7. HTML hidden aria-hidden=false	ignored	ignored	ignored	read	ignored	ignored	ignored	ignored	read	read	?	?	?	?	?	?
8. CSS display:none aria-hidden=false	ignored	ignored	ignored	read	ignored	ignored	ignored	ignored	read	read	?	?	?	?	?	?
9. CSS visibility:hidden aria-hidden=false	ignored	ignored	ignored	read	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
10. HTML hidden with aria-hidden=false child	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?
11. aria-hidden=true with aria-hidden=false child	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	ignored	?	?	?	?	?	?