Re: [csswg-drafts] [css-env][css-conditional] Need an approach to check whether an environment variable is supported (#3576)

From: Emilio Cobos Álvarez via GitHub <sysbot+gh@w3.org> Date: Thu, 31 Jan 2019 11:08:56 +0000 To: public-css-archive@w3.org Message-ID: <issue_comment.created-459305846-1548932935-sysbot+gh@w3.org> · This archive was generated by hypermail 2.4.0 : Tuesday, 5 July 2022 06:41:42 UTC

So I thought that was the purpose for the fallback value in `env()`? But maybe there's a use-case for detecting a particular environment variable?

Ideally you'd use `env(my-var, 10px)` or such.

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