Caption sizing and positioning

There is a fundamental disagreement between Chrome Legacy and Firefox on caption size influence on table width. Chrome uses caption min width as lower limit of table's grid box, FF does not. Firefox also does not support multiple captions.

Caption width limits

Caption minmax and grid width caption.min is lower limit of grid min.

auto

Caption.min vs caption.css_width Caption.css_width is upper limit of caption.min Caption.css_width is lower limit of caption.min

auto
auto

Caption width:50% Percent width is resolved wrt to table width.

auto
auto

Caption height:80% github spec issue. TablesNG will not resolve percentage heights per spec. FF agrees.

auto

Multiple captions Do we allow multiple captions? There are 4 in this test.

over1 over2 under1 under2
2 above me, 2 below me?

Caption margins Margins between captions do not collapse

20px margins
1 caption
20px margins 20px margins
2 captions

Caption margins auto auto margins center captions that are less wide than the table.

auto margins
1 caption
auto margins
1 caption

Vertical writing mode caption

vertical
caption bigger than table
vertical!