Re: [csswg-drafts] [css-tables] visibility: collapse

The completely-rewritten border-collapsing rules currently do not take into account that columns or rows might have been visually hidden. Given how the spec recommends to draw borders, this is technically ok; you would just end up with two half-borders that potentially do not match in style and color in that case. I guess that it could be ugly in some cases, but I don't see this being a common situation either. 

Now, the issue here is that the border-rendering strategy that the spec currently proposes is not what any browser is doing today, so what updating one of the existing implementation to render nicely in that case is probably an implementation-dependent question.

A quick testcase shows that no two browser render the same in this case, which is not surprising given each browser has its own rendering strategy to start with:
https://wptest.center/#/w3x844

The spec currently recommends rendering like this:
![image](https://user-images.githubusercontent.com/364405/27468091-9286cbb6-579c-11e7-802f-6eed0139d954.png)


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Received on Friday, 23 June 2017 05:46:52 UTC