Fix scoping issue with pseudo selectors

[HiDeoo]

Changes

• Closes Scoped CSS miscompilation on pseudo-elements with only pseudo-classes #794

This PR fixes a CSS scoping issue when a compound selector does not contain a type selector and all the subclass selectors are pseudo selectors (e.g. pseudo-classes and pseudo-elements).

To fix this issue, when hitting a pseudo selector for the first time in a compound selector, if there is no type selector, we check if all the subclass selectors are pseudo selectors (this check is only done once per compound selector). If so, we add the scope before the first pseudo selector.

Testing

I added tests matching all the test cases reported in the issue.

Docs

This is a bug fix only, so no docs were added or updated.

[changeset-bot]

🦋 Changeset detected

Latest commit: e30144a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@astrojs/compiler	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR