react-static/src/webpack/rules/cssLoader.js at master · BeheadedKamikaze/react-static · GitHub

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import autoprefixer from 'autoprefixer'
import ExtractTextPlugin from 'extract-text-webpack-plugin'
import postcssFlexbugsFixes from 'postcss-flexbugs-fixes'

export default function ({ stage }) {
  if (stage === 'dev') {
    return {
      test: /\.css$/,
      use: [
        'style-loader',
        {
          loader: 'css-loader',
          options: {
            sourceMap: true,
            importLoaders: 1,
          },
        },
        {
          loader: 'postcss-loader',
          options: {
            // Necessary for external CSS imports to work
            // https://github.com/facebookincubator/create-react-app/issues/2677
            sourceMap: true,
            ident: 'postcss',
            plugins: () => [
              postcssFlexbugsFixes,
              autoprefixer({
                browsers: [
                  '>1%',
                  'last 4 versions',
                  'Firefox ESR',
                  'not ie < 9', // React doesn't support IE8 anyway
                ],
                flexbox: 'no-2009',
              }),
            ],
          },
        },
      ],
    }
  }
  return {
    test: /\.css$/,
    loader: ExtractTextPlugin.extract({
      fallback: {
        loader: 'style-loader',
        options: {
          sourceMap: false,
          hmr: false,
        },
      },
      use: [
        {
          loader: 'css-loader',
          options: {
            importLoaders: 1,
            minimize: true,
            sourceMap: false,
          },
        },
        {
          loader: 'postcss-loader',
          options: {
            // Necessary for external CSS imports to work
            // https://github.com/facebookincubator/create-react-app/issues/2677
            sourceMap: true,
            ident: 'postcss',
            plugins: () => [
              postcssFlexbugsFixes,
              autoprefixer({
                browsers: [
                  '>1%',
                  'last 4 versions',
                  'Firefox ESR',
                  'not ie < 9', // React doesn't support IE8 anyway
                ],
                flexbox: 'no-2009',
              }),
            ],
          },
        },
      ],
    }),
  }
}