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postcss-unique-selectors

Ensure CSS selectors are unique.

Install

With npm do:

npm install postcss-unique-selectors --save

Selectors are sorted naturally, and deduplicated:

h1,h3,h2,h1 {
    color: red
}

h1,h2,h3 {
    color: red
}

See the PostCSS documentation for examples for your environment.