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rrweb-io/CSSOM

GitHub
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Last release:

CSSOM.js is a CSS parser written in pure JavaScript, with a partial implementation of the CSS Object Model. It is useful for turning CSS text into a structured form (for example, parsing rules and selector styles) in browser or Node.js environments (npm package: cssom).

Project status

  • The source (rrweb-io/CSSOM) shows no evidence of active maintenance, with the last recorded update on 2024-10-14, which is nearly two years ago relative to 2026-09-10.
  • The update cadence appears sporadic (at least 3 distinct updates in 2024, with gaps of roughly 1 to 5 months between them), and there have been no updates in 2025 or 2026.

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Recent updates

  • v0.8.0

    v0.8.0 adds parsing and representation support for the CSS @layer at-rule. The library now introduces a new CSS rule type for layer blocks, and the parser can build nested rule trees under @layer declarations.

    Features

  • v0.7.1

    v0.7.1 is a patch release that focuses on fixing CSS parsing errors related to nested @starting-style rules. The release notes claim the parser now correctly handles nested starting-style constructs.

  • v0.7.0

    v0.7.0 adds support for two new CSS at-rules, @starting-style and @container. This extends the library's parsing/handling capabilities to cover these modern CSS features.

    Features