@amoo-miki/sass-loader

中文文档

10.4.1-node-sass-9.0.0-libsass-3.6.5-with-sass-embedded.rc1发布于 2023/10/19MITCommonJS近 30 天下载 3万

Sass loader for webpack

文档目录14 节

Getting Started
Resolving import at-rules
Problems with url(...)
Options
implementation
sassOptions
sourceMap
additionalData
webpackImporter
Examples
Extracts CSS into separate files
Source maps
Contributing
License

@amoo-miki/sass-loader

Loads a Sass/SCSS file and compiles it to CSS.

This is a fork of [email protected] with support for node-sass@9 and mainly created to be used with @amoo-miki/[email protected].

The easiest way to use this is by updating the package.json with:

"devDependencies": {
  "node-sass": "npm:@amoo-miki/[email protected]",
  "sass-loader": "npm:@amoo-miki/[email protected]"
}

Getting Started

To begin, you'll need to install sass-loader:

npm install sass-loader sass webpack --save-dev

sass-loader requires you to install either Dart Sass or Node Sass on your own (more documentation can be found below).

This allows you to control the versions of all your dependencies, and to choose which Sass implementation to use.

ℹ️ We recommend using Dart Sass.

⚠ Node Sass does not work with Yarn PnP feature.

Chain the sass-loader with the css-loader and the style-loader to immediately apply all styles to the DOM or the mini-css-extract-plugin to extract it into a separate file.

Then add the loader to your Webpack configuration. For example:

app.js

import "./style.scss";

style.scss

$body-color: red;

body {
  color: $body-color;
}

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          // Creates `style` nodes from JS strings
          "style-loader",
          // Translates CSS into CommonJS
          "css-loader",
          // Compiles Sass to CSS
          "sass-loader",
        ],
      },
    ],
  },
};

Finally run webpack via your preferred method.

Resolving `import` at-rules

Webpack provides an advanced mechanism to resolve files.

The sass-loader uses Sass's custom importer feature to pass all queries to the Webpack resolving engine. Thus you can import your Sass modules from node_modules. Just prepend them with a ~ to tell Webpack that this is not a relative import:

@import "~bootstrap";

It's important to only prepend it with ~, because ~/ resolves to the home directory. Webpack needs to distinguish between bootstrap and ~bootstrap because CSS and Sass files have no special syntax for importing relative files. Writing @import "style.scss" is the same as @import "./style.scss";

Problems with `url(...)`

Since Sass implementations don't provide url rewriting, all linked assets must be relative to the output.

If you pass the generated CSS on to the css-loader, all urls must be relative to the entry-file (e.g. main.scss).
If you're just generating CSS without passing it to the css-loader, it must be relative to your web root.

You will be disrupted by this first issue. It is natural to expect relative references to be resolved against the .sass/.scss file in which they are specified (like in regular .css files).

Thankfully there are a two solutions to this problem:

Add the missing url rewriting using the resolve-url-loader. Place it before sass-loader in the loader chain.
Library authors usually provide a variable to modify the asset path. bootstrap-sass for example has an $icon-font-path.

Options

Name	Type	Default	Description
`implementation`	`{Object}`	`sass`	Setup Sass implementation to use.
`sassOptions`	`{Object\|Function}`	defaults values for Sass implementation	Options for Sass.
`sourceMap`	`{Boolean}`	`compiler.devtool`	Enables/Disables generation of source maps.
`additionalData`	`{String\|Function}`	`undefined`	Prepends/Appends `Sass`/`SCSS` code before the actual entry file.
`webpackImporter`	`{Boolean}`	`true`	Enables/Disables the default Webpack importer.

`implementation`

Type: Object Default: sass

The special implementation option determines which implementation of Sass to use.

By default the loader resolve the implementation based on your dependencies. Just add required implementation to package.json (sass or node-sass package) and install dependencies.

Example where the sass-loader loader uses the sass (dart-sass) implementation:

package.json

{
  "devDependencies": {
    "sass-loader": "^7.2.0",
    "sass": "^1.22.10"
  }
}

Example where the sass-loader loader uses the node-sass implementation:

package.json

{
  "devDependencies": {
    "sass-loader": "^7.2.0",
    "node-sass": "^5.0.0"
  }
}

Beware the situation when node-sass and sass were installed! By default the sass-loader prefers sass. In order to avoid this situation you can use the implementation option.

The implementation options either accepts sass (Dart Sass) or node-sass as a module.

For example, to use Dart Sass, you'd pass:

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              // Prefer `dart-sass`
              implementation: require("sass"),
            },
          },
        ],
      },
    ],
  },
};

Note that when using sass (Dart Sass), synchronous compilation is twice as fast as asynchronous compilation by default, due to the overhead of asynchronous callbacks. To avoid this overhead, you can use the fibers package to call asynchronous importers from the synchronous code path.

We automatically inject the fibers package (setup sassOptions.fiber) for Node.js less v16.0.0 if is possible (i.e. you need install the fibers package).

Fibers is not compatible with Node.js v16.0.0 or later (see introduction to readme).

package.json

{
  "devDependencies": {
    "sass-loader": "^7.2.0",
    "sass": "^1.22.10",
    "fibers": "^4.0.1"
  }
}

You can disable automatically injecting the fibers package by passing a false value for the sassOptions.fiber option.

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              implementation: require("sass"),
              sassOptions: {
                fiber: false,
              },
            },
          },
        ],
      },
    ],
  },
};

You can also pass the fiber value using this code:

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              implementation: require("sass"),
              sassOptions: {
                fiber: require("fibers"),
              },
            },
          },
        ],
      },
    ],
  },
};

`sassOptions`

Type: Object|Function Default: defaults values for Sass implementation

Options for Dart Sass or Node Sass implementation.

ℹ️ The indentedSyntax option has true value for the sass extension.

ℹ️ Options such as data and file are unavailable and will be ignored.

ℹ We recommend not to set the outFile, sourceMapContents, sourceMapEmbed, sourceMapRoot options because sass-loader automatically sets these options when the sourceMap option is true.

ℹ️ Access to the loader context inside the custom importer can be done using the this.webpackLoaderContext property.

There is a slight difference between the sass (dart-sass) and node-sass options.

Please consult documentation before using them:

Dart Sass documentation for all available sass options.
Node Sass documentation for all available node-sass options.

`Object`

Use and object for the Sass implementation setup.

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              sassOptions: {
                indentWidth: 4,
                includePaths: ["absolute/path/a", "absolute/path/b"],
              },
            },
          },
        ],
      },
    ],
  },
};

`Function`

Allows to setup the Sass implementation by setting different options based on the loader context.

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              sassOptions: (loaderContext) => {
                // More information about available properties https://webpack.js.org/api/loaders/
                const { resourcePath, rootContext } = loaderContext;
                const relativePath = path.relative(rootContext, resourcePath);

                if (relativePath === "styles/foo.scss") {
                  return {
                    includePaths: ["absolute/path/c", "absolute/path/d"],
                  };
                }

                return {
                  includePaths: ["absolute/path/a", "absolute/path/b"],
                };
              },
            },
          },
        ],
      },
    ],
  },
};

`sourceMap`

Type: Boolean Default: depends on the compiler.devtool value

Enables/Disables generation of source maps.

By default generation of source maps depends on the devtool option. All values enable source map generation except eval and false value.

ℹ If a true the sourceMap, sourceMapRoot, sourceMapEmbed, sourceMapContents and omitSourceMapUrl from sassOptions will be ignored.

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              sourceMap: true,
            },
          },
          {
            loader: "sass-loader",
            options: {
              sourceMap: true,
            },
          },
        ],
      },
    ],
  },
};

ℹ In some rare cases node-sass can output invalid source maps (it is a node-sass bug).

In order to avoid this, you can try to update node-sass to latest version or you can try to set within sassOptions the outputStyle option to compressed.

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              sourceMap: true,
              sassOptions: {
                outputStyle: "compressed",
              },
            },
          },
        ],
      },
    ],
  },
};

`additionalData`

Type: String|Function Default: undefined

Prepends Sass/SCSS code before the actual entry file. In this case, the sass-loader will not override the data option but just prepend the entry's content.

This is especially useful when some of your Sass variables depend on the environment:

`String`

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              additionalData: "$env: " + process.env.NODE_ENV + ";",
            },
          },
        ],
      },
    ],
  },
};

`Function`

Sync

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              additionalData: (content, loaderContext) => {
                // More information about available properties https://webpack.js.org/api/loaders/
                const { resourcePath, rootContext } = loaderContext;
                const relativePath = path.relative(rootContext, resourcePath);

                if (relativePath === "styles/foo.scss") {
                  return "$value: 100px;" + content;
                }

                return "$value: 200px;" + content;
              },
            },
          },
        ],
      },
    ],
  },
};

Async

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              additionalData: async (content, loaderContext) => {
                // More information about available properties https://webpack.js.org/api/loaders/
                const { resourcePath, rootContext } = loaderContext;
                const relativePath = path.relative(rootContext, resourcePath);

                if (relativePath === "styles/foo.scss") {
                  return "$value: 100px;" + content;
                }

                return "$value: 200px;" + content;
              },
            },
          },
        ],
      },
    ],
  },
};

`webpackImporter`

Type: Boolean Default: true

Enables/Disables the default Webpack importer.

This can improve performance in some cases. Use it with caution because aliases and @import at-rules starting with ~ will not work. You can pass own importer to solve this (see importer docs).

webpack.config.js

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          "css-loader",
          {
            loader: "sass-loader",
            options: {
              webpackImporter: false,
            },
          },
        ],
      },
    ],
  },
};

Examples

Extracts CSS into separate files

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.

There are two possibilities to extract a style sheet from the bundle:

mini-css-extract-plugin (use this, when using webpack 4 configuration. Works in all use-cases)
extract-loader (simpler, but specialized on the css-loader's output)

webpack.config.js

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

module.exports = {
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          // fallback to style-loader in development
          process.env.NODE_ENV !== "production"
            ? "style-loader"
            : MiniCssExtractPlugin.loader,
          "css-loader",
          "sass-loader",
        ],
      },
    ],
  },
  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: "[name].css",
      chunkFilename: "[id].css",
    }),
  ],
};

Source maps

Enables/Disables generation of source maps.

To enable CSS source maps, you'll need to pass the sourceMap option to the sass-loader and the css-loader.

webpack.config.js

module.exports = {
  devtool: "source-map", // any "source-map"-like devtool is possible
  module: {
    rules: [
      {
        test: /\.s[ac]ss$/i,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              sourceMap: true,
            },
          },
          {
            loader: "sass-loader",
            options: {
              sourceMap: true,
            },
          },
        ],
      },
    ],
  },
};

If you want to edit the original Sass files inside Chrome, there's a good blog post. Checkout test/sourceMap for a running example.

Contributing

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

CONTRIBUTING

License

MIT

版本与发布记录

@amoo-miki/sass-loader 共发布 3 个版本，首次发布于 2023/08/02；过去 12 个月发布了 0 个版本。

版本	发布日期	距今
`10.4.1-node-sass-9.0.0-libsass-3.6.5-with-sass-embedded.rc1`latest	2023/10/19	3 年前
`10.4.1-node-sass-9.0.0-libsass-3.6.5`	2023/08/02	3 年前
`10.4.1`	2023/08/02	3 年前

关于 @amoo-miki/sass-loader 的常见问题

@amoo-miki/sass-loader 是什么？

Sass loader for webpack

如何安装 @amoo-miki/sass-loader？

在项目目录运行 npm install @amoo-miki/sass-loader，或使用 pnpm add / yarn add / bun add。它还需要宿主项目提供 peer 依赖：webpack（^4.36.0 || ^5.0.0）。npm 7 及以上与 pnpm 8 及以上默认会自动安装必需的 peer 依赖，Yarn 需要手动安装。

@amoo-miki/sass-loader 支持 TypeScript 吗？

该包的 package.json 没有声明类型入口。需要类型提示时，可以在 npm 上查找社区维护的 @types/amoo-miki__sass-loader 是否存在。

@amoo-miki/sass-loader 支持 ESM 还是 CommonJS？

以 CommonJS 形式发布，可以直接 require()；在 ES Module 项目中也可以用 import 引入（Node.js 会把 module.exports 作为默认导出）。

@amoo-miki/sass-loader 需要什么版本的 Node.js？

package.json 的 engines 字段要求 Node.js >= 10.13.0。版本不符时 npm 默认只给出警告，开启 engine-strict 后会拒绝安装。

@amoo-miki/sass-loader 可以商用吗？

@amoo-miki/sass-loader 使用 MIT 许可。宽松许可：允许商业使用、修改和再分发，通常只需在分发时保留原版权与许可声明。以上为概括，不构成法律意见，请以许可原文为准。

@amoo-miki/sass-loader 的下载量有多少？

根据 npm 官方下载统计，@amoo-miki/sass-loader 在 2026/10/06 – 2026/11/04 这 30 天内被下载 29,663 次，日均约 989 次。下载量会把 CI 构建、镜像同步和作为其他包依赖的安装一并计入，适合横向比较热度，不能直接等同于使用人数。

@amoo-miki/sass-loader 还在维护吗？

最新版本 10.4.1-node-sass-9.0.0-libsass-3.6.5-with-sass-embedded.rc1 发布于 2023/10/19（3 年前）；至今共发布 3 个版本，其中过去 12 个月发布了 0 个；首次发布于 2023/08/02。发布频率只是参考信号：功能稳定的工具可能很少需要更新，建议结合源码仓库的 issue 和提交记录判断。

npm install @amoo-miki/sass-loader

pnpmpnpm add @amoo-miki/sass-loader
yarnyarn add @amoo-miki/sass-loader
bunbun add @amoo-miki/sass-loader

peer 依赖fibers >= 3.1.0可选node-sass ^4.0.0 || ^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0 || ^9.0.0可选sass ^1.3.0可选sass-embedded ^1.66.1可选webpack ^4.36.0 || ^5.0.0

npm 7+ 与 pnpm 8+ 会自动安装必需的 peer 依赖，Yarn 需手动安装。

在你的项目目录中运行此命令。

近 30 天下载

29,663

约 3万次日均 989 次

统计周期 2026/10/06 – 2026/11/04
数据来自 npm 官方下载统计，今天更新

最新版本10.4.1-node-sass-9.0.0-libsass-3.6.5-with-sass-embedded.rc1发布于 3 年前

开源许可MIT宽松许可

包体积47.2 kB8 个文件 · 解压后

运行依赖5 个另有 5 个 peer 依赖

模块格式CommonJS

TypeScript未声明类型可查找 @types/amoo-miki__sass-loader

Node.js>= 10.13.0

发布版本3 个近 12 个月 0 个

首次发布2023/08/023 年前

元数据更新2023/10/19

每一个软件包背后，
都有分享与创造的人。

@amoo-miki/sass-loader

@amoo-miki/sass-loader

Getting Started

Resolving import at-rules

Problems with url(...)

Options

implementation

sassOptions

Object

Function

sourceMap

additionalData

String

Function

Sync

Async

webpackImporter

Examples

Extracts CSS into separate files

Source maps

Contributing

License

版本与发布记录

关于 @amoo-miki/sass-loader 的常见问题

@amoo-miki/sass-loader 是什么？

如何安装 @amoo-miki/sass-loader？

@amoo-miki/sass-loader 支持 TypeScript 吗？

@amoo-miki/sass-loader 支持 ESM 还是 CommonJS？

@amoo-miki/sass-loader 需要什么版本的 Node.js？

@amoo-miki/sass-loader 可以商用吗？

@amoo-miki/sass-loader 的下载量有多少？

@amoo-miki/sass-loader 还在维护吗？

Resolving `import` at-rules

Problems with `url(...)`

`implementation`

`sassOptions`

`Object`

`Function`

`sourceMap`

`additionalData`

`String`

`Function`

`webpackImporter`