ARIA Live regions: also managing focus

Test 1: Send focus to heading, then immediately inject text into polite live region

Observed behaviour:

• VO on MacOS (Safari and Chrome): heading, then live region
• NVDA (Firefox and Chrome): live region, then heading (?)
• JAWS (Chrome): heading, then live region

A medium length heading

Test 2: Send focus to heading, then immediately inject text into assertive live region

Observed behaviour:

• VO on MacOS (Safari and Chrome): heading, assertive live region ignored (!)
• NVDA (Firefox and Chrome): assertive live region, then heading
• JAWS (Chrome): heading, then assertive live region

A medium length heading

Test 3: Inject text into polite live region, then immediately send focus to heading

Observed behaviour:

• VO on MacOS (Safari and Chrome): heading, then live region
• NVDA (Firefox and Chrome): live region, then heading
• JAWS (Chrome): heading, then live region

A medium length heading

Test 4: Inject text into assertive live region, then immediately send focus to heading

Observed behaviour:

• VO on MacOS (Safari and Chrome): heading, assertive live region ignored (!)
• NVDA (Firefox and Chrome): assertive live region, then heading
• JAWS (Chrome): heading, then assertive live region

A medium length heading