Question

我有一个包，我希望将我的SASS变量导出到其他包中使用它。目前我的所有.scss文件都已编译并放入/dist/main.css文件中。我的webpack配置：

var webpack = require('webpack');
var ExtractTextPlugin = require("extract-text-webpack-plugin");

module.exports = {
  entry: ['./src/index.js'],
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel'
      },
      {
        test:   /\.(scss|sass|css)$/,
        loader: ExtractTextPlugin.extract("style", "css!sass")
      },
      {
        test: /\.(png|woff|woff2|eot|ttf|svg)$/,
        loader: 'url-loader?limit=10000&name=fonts/[hash].[ext]'
      },
      {
        test: /\.scss$/, loader: 'style!css!sass!sass-resources'
      }
    ]
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  output: {
    path: __dirname + '/build',
    publicPath: '/',
    filename: 'index.js',
    library: 'Supernova',
    libraryTarget: 'umd'
  },
  externals: {
    'react': 'react',
    'react-dom': 'react-dom'
  },
  plugins: [
    new ExtractTextPlugin("[name].css")
  ]
};

我的目标是创建一个类似bootstrap-sass的包。

Answer 1

我强烈建议您使用webpack-merge分隔出Sass配置，以便其他软件包使用它。对于您当前的配置，我会做三件事：

将webpack-merge添加到您的项目（npm i --save-dev webpack-merge）。

将您的Sass配置放入一个名为webpack.sass-config.js的单独文件中。它包含以下内容：

var ExtractTextPlugin = require('extract-text-webpack-plugin');

exports.config = function(options) {
  return {
    module: {
      loaders: [
        {
            test:   /\.(scss|sass|css)$/,
            loader: ExtractTextPlugin.extract("style", "css!sass")
        },
        {
            test: /\.scss$/, loader: 'style!css!sass!sass-resources'
        }
      ]
    },
    plugins: [
      new ExtractTextPlugin("[name].css")
    ]
  }
}

// Side note: returning a function instead of a plain object lets
// you pass optional parameters from your main config file. This
// is useful if you want to make something like your compiled css
// file name different for another Webpack project without having
// to edit your Sass configuration file.

将您的webpack.config.js更新为以下内容：

var merge = require('webpack-merge');

// import your separated Sass configuration
var sassConfig = require('webpack.sass-config');

// Define your common config for entry, output, JSX, fonts, etc.
var common = {
  entry: ['./src/index.js'],
  module: {
    loaders: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        loader: 'babel'
      },
      {
        test: /\.(png|woff|woff2|eot|ttf|svg)$/,
        loader: 'url-loader?limit=10000&name=fonts/[hash].[ext]'
      }
    ]
  },
  resolve: {
    extensions: ['', '.js', '.jsx']
  },
  output: {
    path: __dirname + '/build',
    publicPath: '/',
    filename: 'index.js',
    library: 'Supernova',
    libraryTarget: 'umd'
  },
  externals: {
    'react': 'react',
    'react-dom': 'react-dom'
  }
};

// Merge your common config and Sass config
var config = merge(
    common,
    sassConfig.config()
);

// Export the merged configuration
modules.exports = config;

显然，这可以远远超出你的Sass配置。我使用webpack-merge将我的开发配置与生产配置分开。 This article关于Survive JS是如何充分利用Webpack设置的绝佳资源。

Answer 2

如果要将在sass文件中使用的变量提供给已发布程序包的使用者，则需要查看一些针对node-sass的特殊配置。

当前（以及您发布此信息的时间），node-sass支持使用javascript：https://github.com/sass/node-sass#functions--v300---experimental

编写自己的自定义sass函数。

这是未经测试的，但是我们前一段时间在一家我工作过的公司中做到了……要做您想做的事，您需要类似的东西：

src/
  your-package.js
  your-styles.scss

tools/
  constants/
    colours.js

  webpack/
    ...
    base.sass.js
    base.js
    development.js
    production.js

  sass/
    functions/
      colours.js

# tools/webpack/base.sass.js

const Config = require('webpack-config').default

import {
  signature as ColourSignature,
  handler as ColourHandler
} from '@tools/sass/functions/colours

module.exports = new Config()
  .merge({
    module: {
      rules: [
        {
          test: /\.scss$/,
          use: [
            ...
            { loader: 'sass-loader',
              options: {
                sourceMap: true,
                functions: {
                  [ColourSignature]: ColourHandler
                }
              }
            },
          ]
        }
      ]
    }
  })

# src/your-package.js

import Colours from '@tools/constants/colours'
import "./your-styles.scss"

export default YourAwesomeComponent {
  static Colours = Colours
}

export const colours = Colours

# src/your-styles.scss

.your-awesome-component { 
  background-color: ColourGet(veganvomit, sobrightithurts);
}

# tools/sass/functions/colour.js

import Colours from '@tools/constants/colours'

export signature = 'ColourGet($name, $shade: default)'
export handler = function(name, shade) {
  const colour = Colours[name]

  if (!colour) return 

  if (typeof colour === 'string') return colour

  return colour[shade]
}

# tools/sass/constants/colours.js

export default {

  veganvomit: {
    sobrightithurts: "darkkhaki",
    light: "#D2691E",
    default: "#8B4513",
    somethingsomethingsomethingdarkside: "#000"
  }

}

因此，现在您发布软件包时，他们可以从默认导出YourAwesomeClass.Colours访问sass变量，也可以直接从'您的真棒软件包'中导入import {颜色}

Webpack - 导出SASS（.scss）文件

2 个答案: