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BREAKING CHANGE: `css.modules` option has been removed. To import css files (or any other supported pre-processor files) as CSS Modules, append the request with a `?module` resourceQuery.
60 lines
1.9 KiB
Markdown
60 lines
1.9 KiB
Markdown
## CSS
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- [PostCSS](#postcss)
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- [CSS Modules](#css-modules)
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- [Pre-Processors](#pre-processors)
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- [Passing Options to Pre-Processor Loaders](#passing-options-to-pre-processor-loaders)
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### PostCSS
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Vue CLI uses PostCSS internally, and enables [autoprefixer](https://github.com/postcss/autoprefixer) by default. You can configure PostCSS via `.postcssrc` or any config source supported by [postcss-load-config](https://github.com/michael-ciniawsky/postcss-load-config).
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### CSS Modules
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You can [use CSS Modules in `*.vue` files](https://vue-loader.vuejs.org/en/features/css-modules.html) out of the box with `<style module>`.
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If you wish to import style files as CSS Modules in JavaScript, you can import a file with a `?module` resourceQuery:
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``` js
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import styles from './foo.css?module'
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// works for all supported pre-processors as well
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import sassStyles from './foo.scss?module'
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```
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If you wish to customize the CSS modules class name output you can set the `css.localIdentName` option in `vue.config.js`.
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### Pre-Processors
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You can select pre-processors (Sass/Less/Stylus) when creating the project. If you did not do so, you can also just manually install the corresponding webpack loaders. The loaders are pre-configured and will automatically be picked up. For example, to add Sass to an existing project, simply run:
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``` sh
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npm install -D sass-loader node-sass
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```
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Then you can import `.scss` files, or use it in `*.vue` files with:
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``` vue
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<style lang="scss">
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$color = red;
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</style>
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```
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### Passing Options to Pre-Processor Loaders
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Sometimes you may want to pass options to the pre-processor's webpack loader. You can do that using the `css.loaderOptions` option in `vue.config.js`. For example, to pass some shared global variables to all your Sass styles:
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``` js
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// vue.config.js
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const fs = require('fs')
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module.exports = {
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css: {
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loaderOptions: {
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sass: {
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data: fs.readFileSync('src/variables.scss', 'utf-8')
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}
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}
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}
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}
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```
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