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<div align="center">
<a href="https://github.com/webpack/webpack">
<img
width="200"
height="200"
src="https://webpack.js.org/assets/icon-square-big.svg"
>
</a>
<h1>Style Resources Loader</h1>
<p>CSS processor resources loader for webpack.</p>
</div>
<h2 align="center">Install</h2>
```bash
npm i style-resources-loader -D
```
<h2 align="center">Usage</h2>
This loader is a CSS processor resources loader for webpack, which injects your style resources (e.g. `variables, mixins`) into multiple imported `css, sass, scss, less, stylus` modules.
It's mainly used to
- share your `variables, mixins, functions` across all style files, so you don't need to `@import` them manually.
- override `variables` in style files provided by other libraries (e.g. [ant-design](https://github.com/ant-design/ant-design)) and customize your own theme.
### Usage with Vue CLI
See [automatic imports](https://cli.vuejs.org/guide/css.html#automatic-imports) for more details.
<h2 align="center">Examples</h2>
Prepends `variables` and `mixins` to all `scss` files with default resources injector.
**webpack.config.js**
``` js
module.exports = {
// ...
module: {
rules: [{
test: /\.scss$/,
use: ['style-loader', 'css-loader', 'sass-loader', {
loader: 'style-resources-loader',
options: {
patterns: [
'./path/from/context/to/scss/variables/*.scss',
'./path/from/context/to/scss/mixins/*.scss',
]
}
}]
}]
},
// ...
}
```
Appends `variables` to all `less` files and overrides original `less variables`.
**webpack.config.js**
```js
module.exports = {
// ...
module: {
rules: [{
test: /\.less$/,
use: ['style-loader', 'css-loader', 'less-loader', {
loader: 'style-resources-loader',
options: {
patterns: path.resolve(__dirname, 'path/to/less/variables/*.less'),
injector: 'append'
}
}]
}]
},
// ...
}
```
Prepends `variables` and `mixins` to all `stylus` files with customized resources injector.
**webpack.config.js**
``` js
module.exports = {
// ...
module: {
rules: [{
test: /\.styl$/,
use: ['style-loader', 'css-loader', 'stylus-loader', {
loader: 'style-resources-loader',
options: {
patterns: [
path.resolve(__dirname, 'path/to/stylus/variables/*.styl'),
path.resolve(__dirname, 'path/to/stylus/mixins/*.styl')
],
injector: (source, resources) => {
const combineAll = type => resources
.filter(({ file }) => file.includes(type))
.map(({ content }) => content)
.join('');
return combineAll('variables') + combineAll('mixins') + source;
}
}
}]
}]
},
// ...
}
```
<h2 align="center">Options</h2>
|Name|Type|Default|Description|
|:--:|:--:|:-----:|:----------|
|**[`patterns`](#patterns)**|`{string \| string[]}`|`/`|Path to the resources you would like to inject|
|**[`injector`](#injector)**|`{Function \| 'prepend' \| 'append'}`|`'prepend'`|Controls the resources injection precisely|
|**[`globOptions`](#globoptions)**|`{Object}`|`{}`|An options that can be passed to `glob(...)`|
|**[`resolveUrl`](#resolveurl)**|`{boolean}`|`true`|Enable/Disable `@import` url to be resolved|
See [the type definition file](https://github.com/yenshih/style-resources-loader/blob/master/src/types.ts) for more details.
### `patterns`
A string or an array of string, which represents the path to the resources you would like to inject. If the path is relative, it would relative to [webpack context](https://webpack.js.org/configuration/entry-context/).
It supports [globbing](https://github.com/isaacs/node-glob). You could include many files using a file mask.
For example, `'./styles/*/*.less'` would include all `less` files from `variables` and `mixins` directories and ignore `reset.less` in such following structure.
```
./src <-- webpack context
/styles
/variables
|-- fonts.less
|-- colors.less
/mixins
|-- size.less
|-- reset.less
```
Only supports `.css` `.sass` `.scss` `.less` `.styl` as resources file extensions.
### `injector`
An optional function which controls the resources injection precisely. It also supports `'prepend'` and `'append'` for convenience, which means the loader will prepend or append all resources to source files, respectively.
It defaults to `'prepend'`, which implements as an injector function internally.
Furthermore, an injector function should match the following type signature:
```ts
(source: string, resources: StyleResource[]) => string | Promise<string>
```
It receives two parameters:
|Name|Type|Default|Description|
|:--:|:--:|:-----:|:----------|
|**`source`**|`{string}`|`/`|Content of the source file|
|**[`resources`](#resources)**|`{StyleResource[]}`|`/`|Resource descriptors|
#### `resources`
An array of resource descriptor, each contains `file` and `content` properties:
|Name|Type|Default|Description|
|:--:|:--:|:-----:|:----------|
|**`file`**|`{string}`|`/`|Absolute path to the resource|
|**`content`**|`{string}`|`/`|Content of the resource file|
It can be asynchronous. You could use `async / await` syntax in your own injector function or just return a promise.
### `globOptions`
Options that can be passed to `glob(...)`. See [node-glob options](https://github.com/isaacs/node-glob#options) for more details.
### `resolveUrl`
A boolean which defaults to `true`. It represents whether the relative path in `@import` or `@require` statements should be resolved.
If you were to use `@import` or `@require` statements in style resource files, you should make sure that the URL is relative to that resource file, rather than the source file.
You could disable this feature by setting `resolveUrl` to `false`.
<h2 align="center">License</h2>
[MIT](http://www.opensource.org/licenses/mit-license.php)
[npm]: https://img.shields.io/npm/v/style-resources-loader.svg?style=flat-square
[npm-url]: https://www.npmjs.com/package/style-resources-loader
[node]: https://img.shields.io/node/v/style-resources-loader.svg
[node-url]: https://nodejs.org
[downloads]: https://img.shields.io/npm/dm/style-resources-loader.svg?style=flat-square
[downloads-url]: https://www.npmjs.com/package/style-resources-loader
[build]: https://img.shields.io/travis/yenshih/style-resources-loader/master.svg?style=flat-square
[build-url]: https://travis-ci.org/yenshih/style-resources-loader
[coverage]: https://img.shields.io/coveralls/yenshih/style-resources-loader/master.svg?style=flat
[coverage-url]: https://coveralls.io/github/yenshih/style-resources-loader?branch=master
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