Rollup multiple .scss, .sass and .css imports

Installation

npm install --save-dev rollup-plugin-scss sass

If any of them is installed, it will be used automatically, if both installed sass will be used.

Usage

// rollup.config.js
import scss from 'rollup-plugin-scss'

export default {
  input: 'input.js',
  output: {
    file: 'output.js',
    format: 'esm',
    // Removes the hash from the asset filename
    assetFileNames: '[name][extname]'
  },
  plugins: [
    scss() // will output compiled styles to output.css
  ]
}

// OR

export default {
  input: 'input.js',
  output: { file: 'output.js', format: 'esm' },
  plugins: [
    scss({ fileName: 'bundle.css' }) // will output compiled styles to "bundle.css"
  ]
}

// OR

export default {
  input: 'input.js',
  output: { file: 'output.js', format: 'esm' },
  plugins: [
    scss() // will output compiled styles to "assets/output-123hash.css"
  ]
}

// entry.js
import './reset.scss'

Options

Options are passed to the sass compiler (node-sass by default). Refer to the Sass docs for more details on these options.
One notable option is indentedSyntax which you'll need if you're parsing Sass syntax instead of Scss syntax. (e.g. when extracting a Vue <style lang="sass"> tag)
By default the plugin will base the filename for the css on the bundle destination.

scss({
  // Defaults to output.css, Rollup may add a hash to this!
  name: 'output.css',

  // Literal asset filename, bypasses the automated filenaming transformations
  fileName: 'output.css',

  // Callback that will be called ongenerate with two arguments:
  // - styles: the contents of all style tags combined: 'body { color: green }'
  // - styleNodes: an array of style objects: { filename: 'body { ... }' }
  output: function (styles, styleNodes) {
    writeFileSync('bundle.css', styles)
  },

  // Disable any style output or callbacks, import as string
  output: false,

  // Enables/disables generation of source map (default: false)
  sourceMap: true,

  // Choose files to include in processing (default: ['/**/*.css', '/**/*.scss', '/**/*.sass'])
  include: [],

  // Choose files to exclude from processing (default: undefined)
  exclude: [],

  // Determine if node process should be terminated on error (default: false)
  failOnError: true,

  // Prefix global scss. Useful for variables and mixins.
  prefix: `@import "./fonts.scss";`,

  // A Sass (sass compatible) compiler to use
  // - sass and node-sass packages are picked up automatically
  // - you can use this option to specify custom package (e.g. a fork of one of them)
  sass: require('node-sass'),

  // Run postcss processor before output
  processor: () => postcss([autoprefixer({ overrideBrowserslist: 'Edge 18' })]),

  // Process resulting CSS
  processor: (css, map) => ({
    css: css.replace('/*date*/', '/* ' + new Date().toJSON() + ' */'),
    map
  }),

  // or, just string (for backward compatiblity with v2 or simplicity)
  processor: css =>
    css.replace('/*date*/', '/* ' + new Date().toJSON() + ' */'),

  // Log filename and size of generated CSS files (default: true)
  verbose: true

  // Add file/folder to be monitored in watch mode so that changes to these files will trigger rebuilds.
  // Do not choose a directory where rollup output or dest is pointed to as this will cause an infinite loop
  watch: 'src/styles/components',
  watch: ['src/styles/components', 'src/multiple/folders']

  // Any other options are passed to the sass compiler
  includePaths: ...
})

Examples

Using postcss + autoprefixer + includePaths (sass option)

import scss from 'rollup-plugin-scss'
import postcss from 'postcss'
import autoprefixer from 'autoprefixer'

export default {
  input: 'input.js',
  output: {
    file: 'output.js',
    format: 'esm'
  },
  plugins: [
    scss({
      processor: () => postcss([autoprefixer()]),
      includePaths: [
        path.join(__dirname, '../../node_modules/'),
        'node_modules/'
      ]
    })
  ]
}

Minify CSS output:

scss({
  outputStyle: 'compressed'
})

Changelog

Please see CHANGELOG for more information what has changed recently.

Contributing

Contributions and feedback are very welcome. New features should include a test.

To get it running:

1. Clone the project.
2. npm install

Credits

• Thomas Ghysels
• All Contributors

License

The MIT License (MIT). Please see License File for more information.