w3c / w3c/css-validator

Nested Style Rule Parse Error

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#431 3 comments 8 reactions 0 assignees View on GitHub

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Dominant language
Java
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250
Forks
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Description

The CSS Validator is treating a nested style rule as a parse error. Below is the link to the W3C CSS Nesting Module:

  https://www.w3.org/TR/css-nesting-1/

Here is the style rule from the CSS Nesting Module that the CSS Validator rejected:

.foo {
color: red;

.bar {
color: blue;
}
}

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 reproducing the rejection with the nested CSS example in the issue and compare the behavior with the linked W3C CSS Nesting Module. Locate the validator's parsing and validation entry points, then add coverage for this example; done means the nested rule is accepted without a parse error.

Written by the indexing model from the issue text.

Assessment

Tech stack
css
Domain
tooling
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Active
Clarity
Mostly clear
Newbie friendliness
55/100

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