css - Webpack - 导出 SASS (.scss) 文件

Question

我有一个包，我想将我的 SASS 变量导出到其他包使用它。目前我所有的 .scss 文件都被编译并放入/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

如果你想让你在 sass 文件中使用的变量对你发布的包的消费者可用，那么你需要查看 node-sass 的一些特殊配置。

目前(以及在您发布这篇文章时)node-sass 支持在 javascript 中编写您自己的自定义 sass 函数:https://github.com/sass/node-sass#functions--v300---experimental

这是未经测试的，但我们不久前在我工作过的一家公司做过这个......要做你想做的事，你需要类似的东西:

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"
  }

}

现在当你发布你的包时，他们可以从你的默认导出 YourAwesomeClass.Colours 访问 sass 变量，或者他们可以直接导入它 `import { Colors } from 'your-awesome-package'