Nested & overlapping interactive content

[Malvoz]

Many areas of HTML prohibit nesting interactive content, for example the content model of the <a> element is:

Transparent, but there must be no interactive content descendant, a element descendant, or descendant with the tabindex attribute specified.

It's common to have content within maps overlapping. This is probably impossible to avoid with multiple layer sources, and even a single layer source can produce nested interactive elements (<map-a>).

I think it's important that this proposal talks about this. Supposedly in Key Scenarios.

Nested/overlapping interactive content is problematic for users with a pointing device or touch-enabled devices. One way to solve interacting with nested and/or overlapping content is a Feature Index.