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*`function`**createImportedName**— short alias for the [postcss-modules-extract-imports](https://github.com/css-modules/postcss-modules-extract-imports) plugin's `createImportedName` option.
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*`function`**generateScopedName**— short alias for the [postcss-modules-scope](https://github.com/css-modules/postcss-modules-scope) plugin's option. Helps you to specify the custom way to build generic names for the class selectors.
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*`function`**preprocessCss**— in rare cases you may want to precompile styles, before they will be passed to the postcss pipeline. You should use **synchronous** transformations, since `require` function is synchronous.
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*`function`**processCss**— in rare cases you may want to get compiled styles in runtime, so providing this option helps.
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*`string`**rootDir**— absolute path to the project directory. Providing this will result in better generated class names. It can be obligatory, if you run require hook and build tools (like [css-modulesify](https://github.com/css-modules/css-modulesify)) from different working directories.
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*`string`**to**— provides `to` option to the [LazyResult instance](https://github.com/postcss/postcss/blob/master/docs/api.md#processorprocesscss-opts).
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*`array`**use**— custom subset of postcss plugins.
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*`array`**extensions**— attach the hook to additional file extensions (for example `['.scss']`).
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## Usage
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### Examples
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In this section I've tried to cover the common cases of usage.
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Basically you need to load this module before you start loading css-modules. Otherwise you'll get an exception. For example:
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### Basic example
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*icon.css*
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```css
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.icon
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{
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composes: fa fa-hand-peace-o from 'font-awesome/css/font-awesome.css';
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}
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```
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Basically to attach the require hook you need to require this module. If you need to adjust it see the tuning section below.
In rare cases you may want to tune the require hook for better experience.
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### Specify custom function to build generic names
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```javascript
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var hook =require('css-modules-require-hook');
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var path =require('path');
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// specify your custom function
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functiongenerateScopedName(exportedName, path) {/* your code here */}
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hook({
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// setting root to the parent directory
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rootDir:path.join(__dirname, '..')
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generateScopedName: generateScopedName,
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});
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```
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If you want to add any postcss plugins to the pipeline - you should use the `use` option.
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### Using Stylus as a preprocessor
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```javascript
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var hook =require('css-modules-require-hook');
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var stylus =require('stylus');
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hook({
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use: [
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// adding CSS Next plugin
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require('cssnext')(),
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extensions: ['.styl'],
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preprocessCss:function (css, filename) {
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returnstylus(css)
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.set('filename', filename)
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.render();
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},
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});
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// var styles = require('./demo.styl');
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```
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## Tuning (options)
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// adding basic css-modules plugins
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require('postcss-modules-extract-imports'),
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require('postcss-modules-local-by-default'),
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require('postcss-modules-scope')
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]
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To adjust the require hook you need to provide params to the exported function.
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```javascript
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var hook =require('css-modules-require-hook');
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hook({
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// append: [],
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// generateScopedName: function () {},
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// or any other options
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// see the list below
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});
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```
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### `append` array
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Appends custom plugins to the end of the PostCSS pipeline.
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### `prepend` array
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Prepends custom plugins to the beginning of the PostCSS pipeline.
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### `use` array
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Provides the full list of PostCSS plugins to the pipeline. Providing this cancels `append`, `prepend`, `createImportedName`, `generateScopedName` options.
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### `preprocessCss` function
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In rare cases you may want to precompile styles, before they will be passed to the PostCSS pipeline. You should use **synchronous** transformations, since `require` function is synchronous.
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### `processCss` function
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In rare cases you may want to get compiled styles in runtime, so providing this option helps.
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### `extensions` array
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Attach the require hook to additional file extensions (for example `['.scss']`).
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### `rootDir` string
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Provides absolute path to the project directory. Providing this will result in better generated class names. It can be obligatory, if you run require hook and build tools (like [css-modulesify](https://github.com/css-modules/css-modulesify)) from different working directories.
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### `to` string
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Provides `to` option to the [LazyResult instance](https://github.com/postcss/postcss/blob/master/docs/api.md#processorprocesscss-opts).
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### `createImportedName` function
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Short alias for the [postcss-modules-extract-imports](https://github.com/css-modules/postcss-modules-extract-imports) plugin's `createImportedName` option.
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### `generateScopedName` function
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Short alias for the [postcss-modules-scope](https://github.com/css-modules/postcss-modules-scope) plugin's option. Helps you to specify the custom way to build generic names for the class selectors.
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