Tooltip: Add tooltip content to an aria-live div when the tooltip conten...

[dylanb]

...t changes to allow support for all ATs. Fixes #9610. Tooltip announcements don't work in all browsers and AT combinations.

New and improved version now with:

1. no change to core, and
2. works across documents (theoretically because the focus events don't fire so you have to mouseover to get the tooltips to appear for the small number of elements where this still works)

[scottgonzalez]

We should create the live region upon creation, one per widget instance; it also needs to be removed on destroy. You can look at autocomplete for an example.

[jzaefferer]

You can also copy the naming from autocomplete, so assign the created element to this.liveRegion, to reference it when updating and removing.

[dylanb]

ok, have this working with NVDA, JAWS and VO on OS X having some issues with iOS, will submit update soon

[dylanb]

ok, this is as good as it gets. On iOS if the tooltip does not change from one widget to the next, then subsequent widgets might not announce. This is a bug in VO on iOS - have not been able to find a workaround.

[dylanb]

messed up the merge - closing