www-style@w3.org is the mailing list for the CSS Working Group. Or perhaps you should raise an issue.
 
But I wonder if this is really a browser implementation issue. HTML has tbody and thead/tfoot in the expectation that browsers will implement the scrollability - probably doing something like setting an explicit height on the tbody with CSS - some time at the end of the 1990s.
 
I don't think there is any need to change HTML itself, and I suspect that CSS also has the relevant properties - it intuitively seems that something like
 
tbody { height:2em;overflow:hidden }
 
should do the trick, but in the couple of browsers I tested - Yandex, based on blink like Chrome Vivaldi and Opera, and Firefox - it doesn't.
 
cheers
 
Chaals
 
17.11.2016, 22:24, "Steve" <steve.b@osfda.org>:

Sounds like you might need the cooperation of both parties; how can I post to them?

 
On 11/17/2016 4:04 PM, Travis Leithead wrote:

Love it, but this should go to www-style J. I don’t think we want more stylistic attributes in HTML.

 

From: Steve [mailto:steve.b@osfda.org]
Sent: Wednesday, November 16, 2016 11:33 AM
To: public-html@w3.org
Subject: HTML6 Suggestions...

 

Please, oh, please, oh, please: Finally fix TABLEs so that the TBODY can be made scrollable for a fixed table height;
an attribute like:

<table...scrollable="scrollable"...

 

 
 
-- 
Charles McCathie Nevile - web standards - CTO Office, Yandex
chaals@yandex-team.ru - - - Find more at http://yandex.com