mini-css-extract-plugin

This plugin extracts CSS into separate files. It creates a CSS file per JS file which contains CSS. It supports On-Demand-Loading of CSS and SourceMaps.

It builds on top of a new webpack v5 feature and requires webpack 5 to work.

Compared to the extract-text-webpack-plugin:

Async loading
No duplicate compilation (performance)
Easier to use
Specific to CSS

Getting Started

To begin, you'll need to install mini-css-extract-plugin:

npm install --save-dev mini-css-extract-plugin

It's recommended to combine mini-css-extract-plugin with the css-loader

Then add the loader and the plugin to your webpack config. For example:

style.css

body {
  background: green;
}

component.js

import "./style.css";

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [new MiniCssExtractPlugin()],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

⚠️ Note that if you import CSS from your webpack entrypoint or import styles in the initial chunk, mini-css-extract-plugin will not load this CSS into the page. Please use html-webpack-plugin for automatic generation link tags or create index.html file with link tag.

⚠️ Source maps works only for source-map/nosources-source-map/hidden-nosources-source-map/hidden-source-map values because CSS only supports source maps with the sourceMappingURL comment (i.e. //# sourceMappingURL=style.css.map). If you need set devtool to another value you can enable source maps generation for extracted CSS using sourceMap: true for css-loader.

Options

Plugin Options

Name	Type	Default	Description
`filename`	`{String\|Function}`	`[name].css`	This option determines the name of each output CSS file
`chunkFilename`	`{String\|Function}`	`based on filename`	This option determines the name of non-entry chunk files
`ignoreOrder`	`{Boolean}`	`false`	Remove Order Warnings
`insert`	`{String\|Function}`	`document.head.appendChild(linkTag);`	Inserts the `link` tag at the given position for non-initial (async) CSS chunks
`attributes`	`{Object}`	`{}`	Adds custom attributes to the `link` tag for non-initial (async) CSS chunks
`linkType`	`{String\|Boolean}`	`text/css`	Allows loading asynchronous chunks with a custom link type
`runtime`	`{Boolean}`	`true`	Allows to enable/disable the runtime generation
`experimentalUseImportModule`	`{Boolean}`	`false`	Use an experimental webpack API to execute modules instead of child compilers

`filename`

Type: String|Function Default: [name].css

This option determines the name of each output CSS file.

Works like output.filename

`chunkFilename`

Type: String|Function Default: based on filename

i Specifying chunkFilename as a function is only available in webpack@5

This option determines the name of non-entry chunk files.

Works like output.chunkFilename

`ignoreOrder`

Type: Boolean Default: false

Remove Order Warnings. See examples below for details.

`insert`

Type: String|Function Default: document.head.appendChild(linkTag);

⚠️ Only for non-initial (async) chunks.

By default, the mini-css-extract-plugin appends styles (<link> elements) to document.head of the current window.

However in some circumstances it might be necessary to have finer control over the append target or even delay link elements insertion. For example this is the case when you asynchronously load styles for an application that runs inside of an iframe. In such cases insert can be configured to be a function or a custom selector.

If you target an iframe make sure that the parent document has sufficient access rights to reach into the frame document and append elements to it.

`String`

Allows to setup custom query selector. A new <link> element will be inserted after the found item.

webpack.config.js

new MiniCssExtractPlugin({
  insert: "#some-element",
});

A new <link> element will be inserted after the element with id some-element.

`Function`

Allows to override default behavior and insert styles at any position.

⚠ Do not forget that this code will run in the browser alongside your application. Since not all browsers support latest ECMA features like let, const, arrow function expression and etc we recommend you to use only ECMA 5 features and syntax.

⚠ The insert function is serialized to string and passed to the plugin. This means that it won't have access to the scope of the webpack configuration module.

webpack.config.js

new MiniCssExtractPlugin({
  insert: function (linkTag) {
    var reference = document.querySelector("#some-element");
    if (reference) {
      reference.parentNode.insertBefore(linkTag, reference);
    }
  },
});

A new <link> element will be inserted before the element with id some-element.

`attributes`

Type: Object Default: {}

⚠️ Only for non-initial (async) chunks.

If defined, the mini-css-extract-plugin will attach given attributes with their values on <link> element.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      attributes: {
        id: "target",
        "data-target": "example",
      },
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Note: It's only applied to dynamically loaded css chunks, if you want to modify link attributes inside html file, please using html-webpack-plugin

`linkType`

Type: String|Boolean Default: text/css

This option allows loading asynchronous chunks with a custom link type, such as <link type="text/css" ...>.

`String`

Possible values: text/css

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      linkType: "text/css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

`Boolean`

false disables the link type attribute

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      linkType: false,
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

`runtime`

Type: Boolean Default: true

Allows to enable/disable the runtime generation. CSS will be still extracted and can be used for a custom loading methods. For example, you can use assets-webpack-plugin to retreive them then use your own runtime code to download assets when needed.

true to skip.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      runtime: false,
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

`experimentalUseImportModule`

Use an experimental webpack API to execute modules instead of child compilers.

This improves performance and memory usage a lot, but isn't as stable as the normal approach.

When combined with experiments.layers, this adds a layer option to the loader options to specify the layer of the css execution.

You need to have at least webpack 5.33.2.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      experimentalUseImportModule: true,
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Loader Options

Name	Type	Default	Description
`publicPath`	`{String\|Function}`	`webpackOptions.output.publicPath`	Specifies a custom public path for the external resources like images, files, etc
`emit`	`{Boolean}`	`true`	If false, the plugin will extract the CSS but will not emit the file
`esModule`	`{Boolean}`	`true`	Use ES modules syntax

`publicPath`

Type: String|Function Default: the publicPath in webpackOptions.output

Specifies a custom public path for the external resources like images, files, etc inside CSS. Works like output.publicPath

`String`

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: "/public/path/to/",
            },
          },
          "css-loader",
        ],
      },
    ],
  },
};

`Function`

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: (resourcePath, context) => {
                return path.relative(path.dirname(resourcePath), context) + "/";
              },
            },
          },
          "css-loader",
        ],
      },
    ],
  },
};

`emit`

Type: Boolean Default: true

If true, emits a file (writes a file to the filesystem). If false, the plugin will extract the CSS but will not emit the file. It is often useful to disable this option for server-side packages.

`esModule`

Type: Boolean Default: true

By default, mini-css-extract-plugin generates JS modules that use the ES modules syntax. There are some cases in which using ES modules is beneficial, like in the case of module concatenation and tree shaking.

You can enable a CommonJS syntax using:

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [new MiniCssExtractPlugin()],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              esModule: false,
            },
          },
          "css-loader",
        ],
      },
    ],
  },
};

Examples

Recommend

For production builds it's recommended to extract the CSS from your bundle being able to use parallel loading of CSS/JS resources later on. This can be achieved by using the mini-css-extract-plugin, because it creates separate css files. For development mode (including webpack-dev-server) you can use style-loader, because it injects CSS into the DOM using multiple <style></style> and works faster.

i Do not use together style-loader and mini-css-extract-plugin.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const devMode = process.env.NODE_ENV !== "production";

module.exports = {
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          devMode ? "style-loader" : MiniCssExtractPlugin.loader,
          "css-loader",
          "postcss-loader",
          "sass-loader",
        ],
      },
    ],
  },
  plugins: [].concat(devMode ? [] : [new MiniCssExtractPlugin()]),
};

Minimal example

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // all options are optional
      filename: "[name].css",
      chunkFilename: "[id].css",
      ignoreOrder: false, // Enable to remove warnings about conflicting order
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              // you can specify a publicPath here
              // by default it uses publicPath in webpackOptions.output
              publicPath: "../",
            },
          },
          "css-loader",
        ],
      },
    ],
  },
};

Named export for CSS Modules

⚠ Names of locals are converted to camelCase.

⚠ It is not allowed to use JavaScript reserved words in css class names.

⚠ Options esModule and modules.namedExport in css-loader should be enabled.

styles.css

.foo-baz {
  color: red;
}
.bar {
  color: blue;
}

index.js

import { fooBaz, bar } from "./styles.css";

console.log(fooBaz, bar);

You can enable a ES module named export using:

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [new MiniCssExtractPlugin()],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
          },
          {
            loader: "css-loader",
            options: {
              esModule: true,
              modules: {
                namedExport: true,
                localIdentName: "foo__[name]__[local]",
              },
            },
          },
        ],
      },
    ],
  },
};

The `publicPath` option as function

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: (resourcePath, context) => {
                // publicPath is the relative path of the resource to the context
                // e.g. for ./css/admin/main.css the publicPath will be ../../
                // while for ./css/main.css the publicPath will be ../
                return path.relative(path.dirname(resourcePath), context) + "/";
              },
            },
          },
          "css-loader",
        ],
      },
    ],
  },
};

Advanced configuration example

This plugin should not be used with style-loader in the loaders chain.

Here is an example to have both HMR in development and your styles extracted in a file for production builds.

(Loaders options left out for clarity, adapt accordingly to your needs.)

You should not use HotModuleReplacementPlugin plugin if you are using a webpack-dev-server. webpack-dev-server enables / disables HMR using hot option.

webpack.config.js

const webpack = require("webpack");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const devMode = process.env.NODE_ENV !== "production";

const plugins = [
  new MiniCssExtractPlugin({
    // Options similar to the same options in webpackOptions.output
    // both options are optional
    filename: devMode ? "[name].css" : "[name].[contenthash].css",
    chunkFilename: devMode ? "[id].css" : "[id].[contenthash].css",
  }),
];
if (devMode) {
  // only enable hot in development
  plugins.push(new webpack.HotModuleReplacementPlugin());
}

module.exports = {
  plugins,
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          "css-loader",
          "postcss-loader",
          "sass-loader",
        ],
      },
    ],
  },
};

Hot Module Reloading (HMR)

Note: HMR is automatically supported in webpack 5. No need to configure it. Skip the following:

The mini-css-extract-plugin supports hot reloading of actual css files in development. Some options are provided to enable HMR of both standard stylesheets and locally scoped CSS or CSS modules. Below is an example configuration of mini-css for HMR use with CSS modules.

You should not use HotModuleReplacementPlugin plugin if you are using a webpack-dev-server. webpack-dev-server enables / disables HMR using hot option.

webpack.config.js

const webpack = require("webpack");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

const plugins = [
  new MiniCssExtractPlugin({
    // Options similar to the same options in webpackOptions.output
    // both options are optional
    filename: devMode ? "[name].css" : "[name].[contenthash].css",
    chunkFilename: devMode ? "[id].css" : "[id].[contenthash].css",
  }),
];
if (devMode) {
  // only enable hot in development
  plugins.push(new webpack.HotModuleReplacementPlugin());
}

module.exports = {
  plugins,
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {},
          },
          "css-loader",
        ],
      },
    ],
  },
};

Minimizing For Production

To minify the output, use a plugin like css-minimizer-webpack-plugin.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const CssMinimizerPlugin = require("css-minimizer-webpack-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
  optimization: {
    minimizer: [
      // For webpack@5 you can use the `...` syntax to extend existing minimizers (i.e. `terser-webpack-plugin`), uncomment the next line
      // `...`,
      new CssMinimizerPlugin(),
    ],
  },
};

This will enable CSS optimization only in production mode. If you want to run it also in development set the optimization.minimize option to true.

Using preloaded or inlined CSS

The runtime code detects already added CSS via <link> or <style> tag. This can be useful when injecting CSS on server-side for Server-Side-Rendering. The href of the <link> tag has to match the URL that will be used for loading the CSS chunk. The data-href attribute can be used for <link> and <style> too. When inlining CSS data-href must be used.

Extracting all CSS in a single file

The CSS can be extracted in one CSS file using optimization.splitChunks.cacheGroups.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  optimization: {
    splitChunks: {
      cacheGroups: {
        styles: {
          name: "styles",
          type: "css/mini-extract",
          chunks: "all",
          enforce: true,
        },
      },
    },
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Note that type should be used instead of test in Webpack 5, or else an extra .js file can be generated besides the .css file. This is because test doesn't know which modules should be dropped (in this case, it won't detect that .js should be dropped).

Extracting CSS based on entry

You may also extract the CSS based on the webpack entry name. This is especially useful if you import routes dynamically but want to keep your CSS bundled according to entry. This also prevents the CSS duplication issue one had with the ExtractTextPlugin.

const path = require("path");
const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  entry: {
    foo: path.resolve(__dirname, "src/foo"),
    bar: path.resolve(__dirname, "src/bar"),
  },
  optimization: {
    splitChunks: {
      cacheGroups: {
        fooStyles: {
          type: "css/mini-extract",
          name: "styles_foo",
          chunks: (chunk) => {
            return chunk.name === "foo";
          },
          enforce: true,
        },
        barStyles: {
          type: "css/mini-extract",
          name: "styles_bar",
          chunks: (chunk) => {
            return chunk.name === "bar";
          },
          enforce: true,
        },
      },
    },
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Filename Option as function

With the filename option you can use chunk data to customize the filename. This is particularly useful when dealing with multiple entry points and wanting to get more control out of the filename for a given entry point/chunk. In the example below, we'll use filename to output the generated css into a different directory.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      filename: ({ chunk }) => `${chunk.name.replace("/js/", "/css/")}.css`,
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Long Term Caching

For long term caching use filename: "[contenthash].css". Optionally add [name].

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      filename: "[name].[contenthash].css",
      chunkFilename: "[id].[contenthash].css",
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Remove Order Warnings

For projects where css ordering has been mitigated through consistent use of scoping or naming conventions, the css order warnings can be disabled by setting the ignoreOrder flag to true for the plugin.

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  plugins: [
    new MiniCssExtractPlugin({
      ignoreOrder: true,
    }),
  ],
  module: {
    rules: [
      {
        test: /\.css$/i,
        use: [MiniCssExtractPlugin.loader, "css-loader"],
      },
    ],
  },
};

Multiple Themes

webpack.config.js

const MiniCssExtractPlugin = require("mini-css-extract-plugin");

module.exports = {
  entry: "./src/index.js",
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        oneOf: [
          {
            resourceQuery: "?dark",
            use: [
              Self.loader,
              "css-loader",
              {
                loader: "sass-loader",
                options: {
                  additionalData: `@use 'dark-theme/vars' as vars;`,
                },
              },
            ],
          },
          {
            use: [
              Self.loader,
              "css-loader",
              {
                loader: "sass-loader",
                options: {
                  additionalData: `@use 'light-theme/vars' as vars;`,
                },
              },
            ],
          },
        ],
      },
    ],
  },
  plugins: [
    new Self({
      filename: "[name].css",
      attributes: {
        id: "theme",
      },
    }),
  ],
};

src/index.js

import "./style.scss";

let theme = "light";
const themes = {};

themes[theme] = document.querySelector("#theme");

async function loadTheme(newTheme) {
  // eslint-disable-next-line no-console
  console.log(`CHANGE THEME - ${newTheme}`);

  const themeElement = document.querySelector("#theme");

  if (themeElement) {
    themeElement.remove();
  }

  if (themes[newTheme]) {
    // eslint-disable-next-line no-console
    console.log(`THEME ALREADY LOADED - ${newTheme}`);

    document.head.appendChild(themes[newTheme]);

    return;
  }

  if (newTheme === "dark") {
    // eslint-disable-next-line no-console
    console.log(`LOADING THEME - ${newTheme}`);

    import(/* webpackChunkName: "dark" */ "./style.scss?dark").then(() => {
      themes[newTheme] = document.querySelector("#theme");

      // eslint-disable-next-line no-console
      console.log(`LOADED - ${newTheme}`);
    });
  }
}

document.onclick = () => {
  if (theme === "light") {
    theme = "dark";
  } else {
    theme = "light";
  }

  loadTheme(theme);
};

src/dark-theme/_vars.scss

$background: black;

src/light-theme/_vars.scss

$background: white;

src/styles.scss

body {
  background-color: vars.$background;
}

public/index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>Document</title>
    <link id="theme" rel="stylesheet" type="text/css" href="./main.css" />
  </head>
  <body>
    <script src="./main.js"></script>
  </body>
</html>

Media Query Plugin

If you'd like to extract the media queries from the extracted CSS (so mobile users don't need to load desktop or tablet specific CSS anymore) you should use one of the following plugins:

Contributing

Please take a moment to read our contributing guidelines if you haven't yet done so.

CONTRIBUTING

License

MIT

Name		Name	Last commit message	Last commit date
Latest commit History 313 Commits
.github		.github
.husky		.husky
src		src
test		test
.editorconfig		.editorconfig
.eslintignore		.eslintignore
.eslintrc.js		.eslintrc.js
.gitattributes		.gitattributes
.gitignore		.gitignore
.prettierignore		.prettierignore
CHANGELOG.md		CHANGELOG.md
LICENSE		LICENSE
README.md		README.md
babel.config.js		babel.config.js
commitlint.config.js		commitlint.config.js
jest.config.js		jest.config.js
lint-staged.config.js		lint-staged.config.js
package-lock.json		package-lock.json
package.json		package.json
setupTest.js		setupTest.js

License

ChessCom/mini-css-extract-plugin

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mini-css-extract-plugin

mini-css-extract-plugin

Getting Started

Options

Plugin Options

filename

chunkFilename

ignoreOrder

insert

String

Function

attributes

linkType

String

Boolean

runtime

experimentalUseImportModule

Loader Options

publicPath

String

Function

emit

esModule

Examples

Recommend

Minimal example

Named export for CSS Modules

The publicPath option as function

Advanced configuration example

Hot Module Reloading (HMR)

Minimizing For Production

Using preloaded or inlined CSS

Extracting all CSS in a single file

Extracting CSS based on entry

Filename Option as function

Long Term Caching

Remove Order Warnings

Multiple Themes

Media Query Plugin

Contributing

License

About

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`filename`

`chunkFilename`

`ignoreOrder`

`insert`

`String`

`Function`

`attributes`

`linkType`

`String`

`Boolean`

`runtime`

`experimentalUseImportModule`

`publicPath`

`String`

`Function`

`emit`

`esModule`

The `publicPath` option as function

Packages