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Proposal:
css header { background-image: url(hi-res.jpg); } @media (prefers-reduced-data: reduce) { header { background-image: url(low-res.jpg); } }
In a nutshell, this makes developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Save-Data and developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/saveData available from a CSS context. ⤵️ x.com/intenttoship/status/1227397485074747392