w3c / w3c/css-validator

Unrecognized at-rule @container

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Dominant language
Java
Stars
250
Forks
123
PR merge metrics
No merged PRs in 30d

Description

@container my-layout (inline-size > 45em) {
  .media-object {
    grid-template: 'img content' auto / auto 1fr;
  }
}

from https://www.w3.org/TR/css-contain-3/#container-queries is not recognized as valid

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 comparing the validator's handling of the reported @container example with the CSS Containment Level 3 specification linked in the issue. The work is done when this at-rule and its shown syntax are recognized as valid by the CSS Validator; no implementation file or test is identified in the issue.

Written by the indexing model from the issue text.

Assessment

Tech stack
css, java
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
42/100

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