Ensure CSS selectors are unique.

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.

See CONTRIBUTORS.md.

MIT © Ben Briggs