Issues

• Add support for @scope

  clean-css/clean-css#1300 · Filter by author javierrey opened on Sep 11, 2026

• Cannot read properties of undefined (reading '1')

  clean-css/clean-css#1297 · Filter by author Markus-Rost opened on Jul 20, 2026

• Please add support for @supports.

  clean-css/clean-css#1295 · Filter by author ve3 opened on Mar 6, 2026

• how to keep @starting-style

  clean-css/clean-css#1294 · Filter by author xinglie opened on Nov 28, 2025
  1

• node-glob update

  clean-css/clean-css#1293 · Filter by author kapouer opened on Nov 23, 2025

• clean-css removes the percent symbol from "0%" in the function color-mix() breaking the behavior

  clean-css/clean-css#1292 · Filter by author MurzNN opened on Jun 5, 2025
  1

• css defined variables are incompatible

  clean-css/clean-css#1291 · Filter by author ttlxihuan opened on Apr 21, 2025

• merge @media

  clean-css/clean-css#1290 · Filter by author ttlxihuan opened on Apr 9, 2025

• level-1 replaceZeroUnits

  clean-css/clean-css#1289 · Filter by author ttlxihuan opened on Apr 7, 2025

• tailwind css Dark/Light Mode Toggle Not Working After CSS Minification with cleanCSS

  clean-css/clean-css#1287 · Filter by author ibrahimAlselawi opened on Feb 17, 2025

• Invalid property name '&' at 9:2. Ignoring.

  clean-css/clean-css#1286 · Filter by author coderaiser opened on Feb 3, 2025

• border and outline properties cannot contain rgb values with decimal places

  clean-css/clean-css#1285 · Filter by author ajbonner opened on Jan 16, 2025

• spaces before and after nth-child "of"-syntax are removed

  clean-css/clean-css#1284 · Filter by author jonex2 opened on Dec 17, 2024
  1

• Duplicate css variable initialization not removed in minify

  clean-css/clean-css#1283 · Filter by author subi-ksha97 opened on Nov 4, 2024

• border somehow is not merged in level 2 optimization

  clean-css/clean-css#1282 · Filter by author ejz opened on Oct 14, 2024

• Selector ':nth-last-child(1 of selector) ' is broken

  clean-css/clean-css#1280 · Filter by author miherlosev opened on Sep 25, 2024
  3

• Level 1 optimization replaceZeroUnits:false is ignored

  clean-css/clean-css#1278 · Filter by author mrebillard-lmwr opened on Jun 5, 2024
  1

• save ignore comments (/* clean-css ignore:start */) for later runs

  clean-css/clean-css#1277 · Filter by author bes-internal opened on May 31, 2024

• Stop working when contains @layer declaration

  clean-css/clean-css#1272 · Filter by author otomad opened on Mar 12, 2024
  4

• @import statement was automatically inserted "url()"

  clean-css/clean-css#1268 · Filter by author WangZhenHao opened on Jan 11, 2024

• CSS container query unit support

  clean-css/clean-css#1266 · Filter by author bernesto opened on Dec 18, 2023
  3

• "scrollbar-color" and "text-decoration-color" properties' values are not being processed

  clean-css/clean-css#1259 · Filter by author MiaKani opened on Oct 11, 2023

• In translate(), zeros in calc() functions are having units removed

  clean-css/clean-css#1257 · Filter by author mprofitlich opened on Oct 5, 2023

• Issue with WordPress header comment section for the main stylesheet

  clean-css/clean-css#1256 · Filter by author wites opened on Aug 16, 2023

• Border optimization with clean css removes color when using !important

  clean-css/clean-css#1255 · Filter by author MohammedSaberMohammed opened on Aug 9, 2023