[css-view-transitions-2] Revisiting view-transition-name: auto keyword name

[vmpstr]

In #8320 we resolved to add view-transition-name keywords that automatically generate names for view transitions.

We currently have the following:

• match-element: means we will use element identity to match elements
• auto: means we will use the id attribute if one is available, and otherwise fall back to match-element behavior. id will also not match against explicit view-transition-name: <ident> form.

There is pushback against auto value in that it can cause developer mistakes and confusion. @jakearchibald summarized the issue well on the TAG review. The discussion that follows points to the fact that we should reconsider auto as the keyword name.

I believe the behavior is still useful, but would like the group to revisit the name specifically.

I don't have great suggestions right now, so trying to source ideas here.

/cc @nt1m @jakearchibald @noamr

[jakearchibald]

How about attr(id type(<custom-ident>), match-element) 😄