Re: [css-display] CSS Display Review

On 09/20/2016 12:53 AM, fantasai wrote:
>>   <fieldset>
>>     <div style="display:contents">
>>       <legend>legend</legend>
>>     </div>
>>   </fieldset>
>>
>> and what about:
>>
>>   <details>
>>     <div style="display:contents">
>>       <summary>details</summary>
>>       Text.
>>     </div>
>>   </details>

Assuming that the above are the final DOM trees, then they should
create exactly the same CSS boxes as if the <div> element is replaced
by its (DOM) children.  (The only difference is that when the <div>
exists, its children inherits style from it.)
That's how display:contents is implemented in Gecko, and we support
display:contents pretty much everywhere, including tables, shadow DOM
and whatnot.

>> Note that in Gecko the answer is different for those two cases,
>> more or less by accident.

That's just a bug IMO.  I've filed:
https://bugzilla.mozilla.org/show_bug.cgi?id=1303906

/Mats