@unocss/transformer-directives

What is @unocss/transformer-directives?

@unocss/transformer-directives is a transformer for UnoCSS that allows you to use CSS directives within your stylesheets. It provides a way to use utility-first CSS directly in your stylesheets, making it easier to manage and apply styles dynamically.

What are @unocss/transformer-directives's main functionalities?

Using @apply directive

The @apply directive allows you to apply multiple utility classes to a single CSS rule. This makes it easier to manage and reuse styles across your project.

/* styles.css */
.button {
  @apply bg-blue-500 text-white font-bold py-2 px-4 rounded;
}

Using @screen directive

The @screen directive allows you to apply styles based on breakpoints. This is useful for creating responsive designs that adapt to different screen sizes.

/* styles.css */
@screen md {
  .container {
    @apply p-4;
  }
}

Using @variants directive

The @variants directive allows you to apply styles based on different states like hover, focus, etc. This is useful for creating interactive elements that change styles based on user interactions.

/* styles.css */
@variants hover, focus {
  .button {
    @apply bg-blue-700;
  }
}

Other packages similar to @unocss/transformer-directives

tailwindcss

Tailwind CSS is a utility-first CSS framework that provides low-level utility classes to build custom designs. It also supports directives like @apply, @screen, and @variants, making it similar to @unocss/transformer-directives. However, Tailwind CSS is a full-fledged framework, whereas @unocss/transformer-directives is a transformer for UnoCSS.

postcss

PostCSS is a tool for transforming CSS with JavaScript plugins. It can be used to create custom directives and utilities similar to those provided by @unocss/transformer-directives. However, PostCSS is more general-purpose and requires additional configuration and plugins to achieve similar functionality.

windicss

WindiCSS is a utility-first CSS framework inspired by Tailwind CSS. It offers similar functionalities like utility classes and directives. WindiCSS is designed to be faster and more efficient, making it a good alternative to @unocss/transformer-directives for projects that require high performance.

README

@unocss/transformer-directives

UnoCSS transformer for @apply directive

Install

npm i -D @unocss/transformer-directives

import Unocss from 'unocss/vite'
import transformerDirective from '@unocss/transformer-directives'

Unocss({
  transformers: [
    transformerDirective(),
  ],
})

Usage

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

Will be transformed to:

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

Currently only @apply is supported.

CSS Variable Style

To be compatible with vanilla CSS, you can use CSS Variables to replace the @apply directive.

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

To use rules with :, you will need to quote the value

.custom-div {
  --at-apply: "hover:text-red";
}

This feature is enabled by default (with prefix --at-), can you configure it or disable it via:

transformerDirective({
  varStyle: '--my-at-',
  // or disable with:
  // varStyle: false
})

License

MIT License © 2022-PRESENT hannoeru