Observed arrival · 2026-11-06
CSS Post Processor: selectors for things CSS can’t see
A browser-side script that extends CSS with state-aware selectors, per-element values, variables, and nesting—without a build step.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Frontend developers avoiding one-off DOM scripts
- Worth noticing
- The homepage says it is 10.4 KB, dependency-free, MIT-licensed, and in production since 2016.
Field notes
The examples pair each extended selector with a concrete page behavior: reveal a card after it enters view, add a shadow while a sticky header is pinned, or show a “Read more” link only when text is cut off. Other snippets use $[index] inside image URLs and compare numeric data attributes. The homepage describes a runtime script rather than a build pipeline, and lists Docs, Examples, Compare, Changelog, GitHub, and npm among its links.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue