Re: [csswg-drafts] [css-conditional-4] Feature detection for descriptors

Sure, but when you want to use a value, you're going to use it somewhere. And it is possible that the UA supports that value without supporting it where you planned to use it.

For instance, a newer version of a property may accept % and length while the old one only took %. The browser you're in does not yet support the length version yet, but does support the new fancy length unit you want to use in places where it does support length.

In that sense, while `@supports unit(1ch)` would something that is technically true, it seems a bit of a footgun: `@supports unit(1ch) { prop-that-used-to-take-percent-only: 1ch; }`

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Received on Friday, 23 March 2018 05:36:44 UTC