w3c / w3c/csswg-drafts

[css-page-3] Allow custom property declarations in `@page` and margin rules

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css-page-3
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Description

Chrome/FF (at least) allows custom properties in @page and margin rules although this is not allowed by CSS Paged Media 3. CSS Anchor Position 1 does not allow them in @try.

But I cannot think of a valid reason to exclude them.

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reading the CSS Paged Media 3 rules for @page and margin rules, then compare the CSS Anchor Position 1 treatment of custom properties in @try. Determine whether the specifications should permit these declarations and update the relevant editor-draft text if agreed; done means the allowance is consistently specified.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
documentation, web-dev
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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