SVGs are usually authored with a transparent background, and usually assume they're displayed against a light background, using black text/etc. This often renders them unreadable in darkmode.
To guard against this, this PR automatically gives them a white background, unless they have a .darkmode-aware class.
See also https://github.com/whatwg/html/pull/10257, where I'm fixing all of HTML's SVG's to be darkmode-aware. These PRs can be merged in either order; both "fix" the problem, this one just does it in a slightly less good (but more generic) way. I'll probably review the other WHATWG specs for SVG diagrams that need to be flagged as well, but later.
SVGs are usually authored with a transparent background, and usually assume they're displayed against a light background, using black text/etc. This often renders them unreadable in darkmode.
To guard against this, this PR automatically gives them a white background, unless they have a
.darkmode-awareclass.See also https://github.com/whatwg/html/pull/10257, where I'm fixing all of HTML's SVG's to be darkmode-aware. These PRs can be merged in either order; both "fix" the problem, this one just does it in a slightly less good (but more generic) way. I'll probably review the other WHATWG specs for SVG diagrams that need to be flagged as well, but later.