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UnoCSS

PostCSS Plugin ​

PostCSS plugin for UnoCSS. Supports @apply, @screen and theme() directives.

Source Code

WARNING

This package is in an experimental state right now. It doesn't follow semver, and may introduce breaking changes in patch versions.

Install ​

bash

pnpm add -D unocss @unocss/postcss

bash

yarn add -D unocss @unocss/postcss

bash

npm install -D unocss @unocss/postcss

bash

bun add -D unocss @unocss/postcss

postcss.config.mjs

ts

import UnoCSS from '@unocss/postcss'

export default {
  plugins: [
    UnoCSS(),
  ],
}

uno.config.ts

ts

import { defineConfig, presetWind3 } from 'unocss'

export default defineConfig({
  content: {
    filesystem: [
      '**/*.{html,js,ts,jsx,tsx,vue,svelte,astro,marko}',
    ],
  },
  presets: [
    presetWind3(),
  ],
})

Usage ​

@unocss ​

@unocss at-rule is a placeholder. It will be replaced by the generated CSS.

You can also inject each layer individually:

style.css

css

@unocss preflights;
@unocss default;

/*
  Fallback layer. It's always recommended to include.
  Only unused layers will be injected here.
*/
@unocss;

If you want to include all layers no matter whether they are previously included or not, you can use @unocss all. This is useful if you want to include generated CSS in multiple files.

Or if you want to exclude a specific layer, you can use the @unocss !<layer> directive:

css

@unocss !preflights, !<other-layer>;

@apply ​

css

.custom-div {
  @apply text-center my-0 font-medium;
}

Will be transformed to:

css

.custom-div {
  margin-top: 0rem;
  margin-bottom: 0rem;
  text-align: center;
  font-weight: 500;
}

@screen ​

The @screen directive allows you to create media queries that reference your breakpoints by name comes from theme.breakpoints.

css

.grid {
  @apply grid grid-cols-2;
}
@screen xs {
  .grid {
    @apply grid-cols-1;
  }
}
@screen sm {
  .grid {
    @apply grid-cols-3;
  }
}
/* ... */

Will be transformed to:

css

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 320px) {
  .grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}
@media (min-width: 640px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
/* ... */

Breakpoint Variant Support ​

@screen also supports lt、at variants

@screen lt ​

css

.grid {
  @apply grid grid-cols-2;
}
@screen lt-xs {
  .grid {
    @apply grid-cols-1;
  }
}
@screen lt-sm {
  .grid {
    @apply grid-cols-3;
  }
}
/* ... */

Will be transformed to:

css

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (max-width: 319.9px) {
  .grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}
@media (max-width: 639.9px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
/* ... */
@screen at ​

css

.grid {
  @apply grid grid-cols-2;
}
@screen at-xs {
  .grid {
    @apply grid-cols-1;
  }
}
@screen at-xl {
  .grid {
    @apply grid-cols-3;
  }
}
@screen at-xxl {
  .grid {
    @apply grid-cols-4;
  }
}
/* ... */

Will be transformed to:

css

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 320px) and (max-width: 639.9px) {
  .grid {
    grid-template-columns: repeat(1, minmax(0, 1fr));
  }
}
@media (min-width: 1280px) and (max-width: 1535.9px) {
  .grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
@media (min-width: 1536px) {
  .grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}
/* ... */

theme() ​

Use the theme() function to access your theme config values using dot notation.

css

.btn-blue {
  background-color: theme('colors.blue.500');
}

Will be compiled to:

css

.btn-blue {
  background-color: #3b82f6;
}