Support CSS attribute selectors in src/client/cssom (e.g. link[rel="modulepreload"]): parsing & matching #270
Description
Feature Request
Implement support for CSS attribute selectors in the CSSOM engine, specifically for selectors such as link[rel="modulepreload"], including both parsing and matching logic.
Requirements
- Extend the CSSOM parser to recognize and correctly handle attribute selectors (e.g.
[attr=value],[attr],[attr^=val], etc.) - Ensure the matching engine can test DOM elements against attribute selectors as per the CSS spec
- Demonstrate with examples such as
link[rel="modulepreload"]in both parser and matcher tests - Update/fix affected unit tests and add new coverage for edge cases
Related Areas
- src/client/cssom (core implementation)
- Associated test cases and documentation
Acceptance Criteria
- CSS attribute selector parsing and matching is correctly implemented according to the CSS standard
- Example selectors like
link[rel="modulepreload"]match elements as expected - All relevant unit tests pass and new tests cover edge cases
- Documentation updated (if needed)
This task will improve standard compliance for DOM/CSS integration and enable use cases such as modulepreload and other advanced resource hints.