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Files

T

The CSS minifier we currently use (clean-css) is not maintained and
lacks support for new CSS features. CSSNano is a replacement that
supports features we need (primarily container queries).

This CL only adds the relevant dependencies, and does not use it. I will
do that (and remove clean-css) in a follow-up.

Bug: 1399763
Change-Id: I899ecc4482164404dd5ac2fd13f92fb797978e29
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/4092305
Commit-Queue: Jack Franklin <jacktfranklin@chromium.org>
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Commit-Queue: Alex Rudenko <alexrudenko@chromium.org>
Auto-Submit: Jack Franklin <jacktfranklin@chromium.org>

2022-12-09 12:08:23 +00:00

2.5 KiB

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PostCSS Discard Overridden

PostCSS plugin to discard overridden @keyframes or @counter-style.

@keyframes or @counter-style will be overridden by those who share the same identifiers and appear later in stylesheets. So we can discard all of them except the last one. When defined inside a @media or @supports rule, @keyframes and @counter-style rules only override global rules in some of the client browsers so they need handled separately. This plugin has taken care of this and transforms the PostCss AST safely.

@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 0.8;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 0.8;
  }
}
@media (max-width: 500px) {
  @-webkit-keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }
  @keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }
  @-webkit-keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 0.8;
    }
  }
  @keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 0.8;
    }
  }
  @supports (display: flex) {
    @-webkit-keyframes fade-in {
      0% {
        opacity: 0;
      }
      100% {
        opacity: 1;
      }
    }
    @keyframes fade-in {
      0% {
        opacity: 0;
      }
      100% {
        opacity: 1;
      }
    }
  }
}
@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

@media (max-width: 500px) {
  @-webkit-keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 0.8;
    }
  }
  @keyframes fade-in {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 0.8;
    }
  }
  @supports (display: flex) {
    @-webkit-keyframes fade-in {
      0% {
        opacity: 0;
      }
      100% {
        opacity: 1;
      }
    }
    @keyframes fade-in {
      0% {
        opacity: 0;
      }
      100% {
        opacity: 1;
      }
    }
  }
}
@-webkit-keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes fade-in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}

Usage

See the PostCSS documentation for examples for your environment.

Contributors

See CONTRIBUTORS.md.

2.5 KiB Raw Permalink Blame History

PostCSS Discard Overridden

Usage

Contributors

2.5 KiB

Raw Permalink Blame History