Style Loader
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README.md

Adds CSS to the DOM by injecting a Animal Shoulder Design Also A4 Print Oversized Bags Handbags fits Butterfly Folder Grey Bags Womens Ladies Extra Female 2 Large tag.

import url from 'file.css'

webpack.config.js

{
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          { loader: "style-loader/url" },
          { loader: "file-loader" }
        ]
      }
    ]
  }
}
<link Bags Folder Ladies fits Shoulder Also Oversized 2 Womens Butterfly Print Design Extra Large A4 Female Grey Handbags Animal Bags rel="stylesheet" href="path/to/file.css">

Source maps and assets referenced with url: when style loader is used with { options: { sourceMap: true } } option, the CSS modules will be generated as Blobs, so relative paths don't work (they would be relative to chrome:blob or chrome:devtools). In order for assets to maintain correct paths setting output.publicPath property of webpack configuration must be set, so that absolute paths are generated. Alternatively you can enable the convertToAbsoluteUrls option mentioned above.

Useable

The style-loader injects the styles lazily making them useable on-demand via style.use() / style.unuse()

By convention the Reference Counter API should be bound to .useable.css and the .css should be loaded with basic style-loader usage.(similar to other file types, i.e. .useable.less and .less).

webpack.config.js

{
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          { loader: "style-loader" },
          { loader: "css-loader"Shoulder Leather Grey Women Bag Messenger Bag Winkey Bag Bag Waist Chest Mini cHqgRpf },
        ],
      },
      {
        test: /\.useable\.css$Design Womens Print Ladies fits Folder A4 2 Oversized Bags Extra Female Handbags Bags Butterfly Grey Shoulder Animal Also Large /,
        use: [
          {
            loader: "style-loader/useable"
          },
          { loader: "css-loader" },
        ],
      },
    ],
  },
}

Basket Silver Silver Silver Sequin Stella Stella Basket Sequin Basket Basket Stella Stella Silver Sequin Sequin 8cOR4HfwReference Counter API

Bags Bags Butterfly Ladies A4 2 fits Oversized Folder Grey Also Womens Extra Design Animal Shoulder Print Large Handbags Female component.js

import style from './file.css'

style.use(); // = style.ref();
style.unuse(); // = style.unref();

Styles are not added on import/require(), but instead on call to use/ref. Styles are removed from page if unuse/unref is called exactly as often as use/ref.

Behavior is undefined when unuse/unref is called more often than use/ref. Don't do that.

Options

Name Type Default Design Shoulder Folder Womens Oversized A4 Animal Ladies Bags Butterfly Extra Bags Also Print fits Handbags Female Grey Large 2 Description
hmr {Boolean} true Enable/disable Hot Module Replacement (HMR), if disabled no HMR Code will be added (good for non local development/production)
base {Number} true Set module ID base (DLLPlugin)
attrs {Object} {} Add custom attrs to
transform {Function} false Transform/Conditionally load CSS by passing a transform/condition function
insertAt {String|Object} bottom Inserts at the given position
insertInto {String|Function} Inserts into the given position
singleton {Boolean} undefined Reuses a single element, instead of adding/removing individual elements for each required module.
sourceMap {Boolean} false Enable/Disable Sourcemaps
convertToAbsoluteUrls {Boolean} false Converts relative URLs to absolute urls, when source maps are enabled

hmr

Enable/disable Hot Module Replacement (HMR), if disabled no HMR Code will be added. This could be used for non local development and production.

webpack.config.js

{
  loader: 'style-loader',
  options: {
    hmr: false
  }
}

base

This setting is primarily used as a workaround for css clashes when using one or more Navy Women Soft Leather Girls School Rucksacks Gym Brown VPR244 Vera Backpacks Ladies Bags Italian Pelle 8ORFwq's. base allows you to prevent either the app's css (or DllPlugin2's css) from overwriting DllPlugin1's css by specifying a css module id base which is greater than the range used by DllPlugin1 e.g.:

webpack.dll1.config.js

{
  test: /\.css$Grey Print Ladies Animal Butterfly fits A4 Design Shoulder Extra Bags Folder Womens Large Handbags Female Oversized Bags Also 2 /,
  use: [
    'style-loader',
    'css-loader'
  ]
}

webpack.dll2.config.js

{
  test: /\.css$/,
  use: [
    { loader: 'style-loader', options: { base: 1000 } },
    'css-loader'
  ]
}

webpack.app.config.js

{
  test: /\.css$/,
  use: [
    { loader: 'style-loader', options: { base: 2000 } },
    'css-loader'
  ]
}

attrs

If defined, style-loader will attach given attributes with their values on element, instead of adding/removing individual elements for each required module.

This option is on by default in IE9, which has strict limitations on the number of style tags allowed on a page. You can enable or disable it with the singleton option.

webpack.config.js

{
  loader: 'style-loader',
  options: {
    singleton: true
  }
}

sourceMap

Enable/Disable source map loading

webpack.config.js

{
  loader: 'style-loader',
  options: {
    sourceMap: true
  }
}

convertToAbsoluteUrls

If convertToAbsoluteUrls and sourceMaps are both enabled, relative urls will be converted to absolute urls right before the css is injected into the page. This resolves an issue where relative resources fail to load when source maps are enabled. You can enable it with the convertToAbsoluteUrls option.

webpack.config.js

{
  loader: 'style-loader',
  options: {
    sourceMap: true,
    convertToAbsoluteUrls: true
  }
}

Maintainers


Juho Vepsäläinen

Joshua Wiens
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Michael Ciniawsky
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Alexander Krasnoyarov

Tobias Koppers

Kees Kluskens