# @unocss/transformer-directives
<!-- @unocss-ignore -->
UnoCSS transformer for `@apply`、`@screen` and `theme()` directive
## Install
```bash
npm i -D @unocss/transformer-directives
```
```ts
// uno.config.ts
import { defineConfig } from 'unocss'
import transformerDirectives from '@unocss/transformer-directives'
export default defineConfig({
// ...
transformers: [
transformerDirectives(),
],
})
```
## Usage
### `@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;
}
```
#### CSS Variable Style
To be compatible with vanilla CSS, you can use CSS custom properties to replace the `@apply` directive.
```css
.custom-div {
--at-apply: text-center my-0 font-medium;
}
```
To use rules with `:`, you will need to quote the value
```css
.custom-div {
--at-apply: "hover:text-red";
}
```
This feature is enabled by default with a few alias, you can configure or disable it via:
```js
transformerDirectives({
// the defaults
applyVariable: ['--at-apply', '--uno-apply', '--uno'],
// or disable with:
// applyVariable: false
})
```
### `@screen`
The `@screen` directive allows you to create media queries that reference your breakpoints by name comes from [`theme.breakpoints`](https://github.com/unocss/unocss/blob/main/README.md#extend-theme).
```css
.grid {
--uno: grid grid-cols-2;
}
@screen xs {
.grid {
--uno: grid-cols-1;
}
}
@screen sm {
.grid {
--uno: 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 {
--uno: grid grid-cols-2;
}
@screen lt-xs {
.grid {
--uno: grid-cols-1;
}
}
@screen lt-sm {
.grid {
--uno: 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 {
--uno: grid grid-cols-2;
}
@screen at-xs {
.grid {
--uno: grid-cols-1;
}
}
@screen at-xl {
.grid {
--uno: grid-cols-3;
}
}
@screen at-xxl {
.grid {
--uno: 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;
}
```
## License
MIT License © 2022-PRESENT [hannoeru](https://github.com/hannoeru)