Comparison of supported html and css tags in various ebook formats

[GrannyGrump]

I was googling around, and came upon these tables of ebook-format/platform comparisons at atavist.com (an online publishing platform).

CSS Support:
http://help.atavist.com/ebook:css

HTML Support:
http://help.atavist.com/ebook:html

I am not sure how current the information is (no dates displayed on their pages), but the site blog has articles posted in 2015 and 2016.

Possibly useful?

A very interesting point:

Adobe Digital Editions (affects Bluefire Reader and ADE apps)

◾ ADE will remove all custom styles if your CSS file has any validation errors

◾ ADE will remove all custom styles if your CSS file has any media queries in it. We’ve filed this as a bug with Adobe but don’t know of a fix date.

[AlexBell]

Originally Posted by GrannyGrump

I was googling around, and came upon these tables of ebook-format/platform comparisons at atavist.com (an online publishing platform).

CSS Support:
http://help.atavist.com/ebook:css

HTML Support:
http://help.atavist.com/ebook:html

I am not sure how current the information is (no dates displayed on their pages), but the site blog has articles posted in 2015 and 2016.

Possibly useful?

A very interesting point:

Thanks, that's quite helpful

[dgatwood]

ADE doesn't barf on all media queries; it has a very limited hack that explicitly ignores a few of the most basic queries, but things like "not" trip it up. And many of the other "at rules" explode in various ways, including @page.

More to the point, ADE does not follow the CSS specification's rules for how to handle unknown declarations; the spec makes it clear how to parse both at rules and normal rules, and how to find the end of that declaration. The spec also makes it clear that unknown rules should be ignored. ADE's parser does neither.

IMO, Adobe needs to grab one of the many open source CSS parser implementations and use it, rather than reimplementing the wheel (badly).

The way I solve this is to treat ADE as the baseline style, and put all my @media and @page queries into a separate CSS file that modifies the styles from there. I also put a few nonstandard styles that fix rendering on specific nonstandard rendering engines but cause ADE to barf. ADE, of course, barfs on that second CSS stylesheet and ignores it, but it doesn't matter, because none of those styles are intended to apply to ADE.