Как настроить возможность использования css модулей в react?

Question

[lexstile]

webpack:

const HtmlWebpackPlugin = require('html-webpack-plugin');
const autoprefixer = require('autoprefixer');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const eslintFormatter = require('react-dev-utils/eslintFormatter');

const htmlWebpackPluginConfig = new HtmlWebpackPlugin({
  template: './src/index.html',
  filename: './index.html',
});

const miniCssExtractConfig = new MiniCssExtractPlugin({
  filename: '[name].[hash].css',
  chunkFilename: '[id].[hash].css',
});

module.exports = {
  entry: './src/index.js',
  output: {
    path: `${__dirname}/dist`,
    publicPath: '/',
    filename: 'main.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: [
          {
            loader: 'babel-loader',
          },
          {
            options: {
              formatter: eslintFormatter,
              eslintPath: require.resolve('eslint'),

            },
            loader: require.resolve('eslint-loader'),
          },
        ],
      },
      {
        test: /\.css$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: [
                autoprefixer({
                  browsers: ['> 0%'],
                }),
              ],
              sourceMap: true,
            },
          },
        ],
      },
      {
        test: /\.less$/,
        use: [
          MiniCssExtractPlugin.loader,
          'css-loader',
          {
            loader: 'postcss-loader',
            options: {
              plugins: [
                autoprefixer({
                  browsers: ['> 0%'],
                }),
              ],
              sourceMap: true,
              // module: true,
              // localIdentName: '[name]__[local]__[hash:base64:5]',
            },
          },
          'less-loader',
        ],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx', '.css', '.less'],
  },
  plugins: [
    htmlWebpackPluginConfig,
    miniCssExtractConfig,
    autoprefixer,
  ],
  devServer: {
    contentBase: './dist',
    open: 'chrome',
  },
};

Компонент:

// @flow
import * as React from 'react';
import styles from './Header.less';

// возвращает undefined на месте styles.header
export const Header = ({ children }) => (
  <nav className={`${styles.header} navbar navbar-dark bg-dark`}>
    <div className="container">
      <div className="row m-auto">
        <i className="fa fa-film fa-2x text-white my-auto" />
        <div className="h3 ml-3 my-auto text-light">{children}</div>
      </div>
    </div>
  </nav>
);

Answer 1

[cython]

Необходимо использовать специальные библиотеки для этого.
1. CSS Modules - https://github.com/css-modules/css-modules
2. React CSS Modules (нынче плагин для babel) - https://github.com/gajus/babel-plugin-react-css-modules

Comments

[lexstile]

Эм, я в загрузчике включил, работает:

{
            loader: 'css-loader',
            options: {
              modules: true,
              localIdentName: '[local]__[hash:base64:5]',
            },
          },

Answer 2

[Антон Спирин]

css-loader#modules