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Detects unminified CSS that could be optimized
Rule IDperf/unminified-css
CategoryPerformance
ScopePer-page
Severitywarning
Weight4/10

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Solution

Minify CSS to reduce file size and improve load times. Use build tools like cssnano, clean-css, or PostCSS with cssnano plugin. Most bundlers (Webpack, Vite, esbuild) can minify CSS automatically in production mode. Minification removes whitespace, comments, and optimizes syntax.

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Options

This rule supports the following configuration options:
OptionTypeDefaultDescription
min_size_bytesunknownundefinedMinimum CSS size in bytes to check for minification
newline_ratio_thresholdunknownundefinedNewlines per character ratio threshold for unminified detection

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Configuration Example

squirrel.toml
[rules."perf/unminified-css"]
min_size_bytes = undefined
newline_ratio_threshold = undefined

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Enable / Disable

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Disable this rule

squirrel.toml
[rules]
disable = ["perf/unminified-css"]

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Disable all Performance rules

squirrel.toml
[rules]
disable = ["perf/*"]

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Enable only this rule

squirrel.toml
[rules]
enable = ["perf/unminified-css"]
disable = ["*"]