How to render <summary> when it has display style like "table-cell"?

[aethanyc]

The <summary> tag could have various display style. I wonder what to do to when it has style other than the default display: list-item. For example, when <summery> has display: table-cell. Do we need to move the element to the front and render it as the "summary"? Does display: table-cell on summary make sense?

One possible idea is to define the concept of "rendered summary" like "rendered legend", and we only render the first summary tag as the "rendered summary" only if it satisfies certain conditions. Other

element would be rendered according to its display style as if it is

. The downside of this is that it might make the rendering complex because we will need to keep searching for the first summary element that satisfy the conditions, and the first child summary element might not be the rendered summary.

Another one is always render the first child summary element like spec says now, but we restrict the possible display value to a subset like none, block, list-item and ignore other values.

Any other ideas? @bzbarsky @annevk

[zcorpan]

The spec says

The details element is expected to render as a block box. The element's shadow tree is expected to take the element's first child summary element, if any, and place it in a first block box container, and then take the element's remaining descendants, if any, and place them in a second block box container.

So isn't it well defined what should happen for different 'display' values of the summary, since CSS defines behavior for any 'display' value inside a block box? (In the case of 'table-cell', it's wrapped in an anonymous table and table row.)

[bzbarsky]

I thought there was agreement that the current spec language is not the behavior people actually want? But I admit I haven't been following this closely...

[aethanyc]

Another example is whether <summary style="display: contents"> is considered valid since is does not produce a box itself when rendering. It's questionable to move such a element child to the front.