CSS Webpack 配置中的加载程序无法正常工作

Question

我正在尝试整合 https://www.npmjs.com/package/react-date-range 当我导入 css 文件时，加载程序出现问题。我的 webpack 文件和错误信息如下所示。感谢有关此问题的任何帮助

Webpack 配置文件

var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');
var CircularDependencyPlugin = require('circular-dependency-plugin');
var ExtractCssChunks = require("extract-css-chunks-webpack-plugin");

var config = require('./../config');

var BASE_PATH = process.env.BASE_PATH || '/';

module.exports = {
    name: 'client',
    devtool: 'cheap-eval-source-map',
    target: 'web',
    mode: 'development',
    
    node: { fs: 'empty' },
    externals: [
        { './cptable': 'var cptable' },
        { './jszip': 'jszip' }
    ],
    entry: {
        app: [path.join(config.srcDir, 'index.js')]
    },
    output: {
        filename: '[name].bundle.js',
        chunkFilename: '[name].chunk.js',
        path: config.distDir,
        publicPath: BASE_PATH
    },
    resolve: {
        modules: [
            'node_modules',
            config.srcDir
        ]
    },
    plugins: [
        new CircularDependencyPlugin({
            exclude: /a\.js|node_modules/,
            failOnError: true,
            allowAsyncCycles: false,
            cwd: process.cwd(),
        }),
        new HtmlWebpackPlugin({
            template: config.srcHtmlLayout,
            inject: false,
            chunksSortMode: 'none'
        }),
        new webpack.DefinePlugin({
            'process.env.NODE_ENV': JSON.stringify('development'),
            'process.env.BASE_PATH': JSON.stringify(BASE_PATH),
        }),
        new webpack.NamedModulesPlugin(),
        new webpack.HotModuleReplacementPlugin(),
        new ExtractCssChunks(),
    ],
    module: {
        rules: [
            {
                test: /\.js$/,
                exclude: /node_modules/,
                use: 'babel-loader'
            },
            // Modular Styles
            {
                test: /\.css$/,
                use: [
                    { loader: 'style-loader' },
                    {
                        loader: 'css-loader',
                        options: {
                            modules: true,
                            importLoaders: 1,
                        }
                    },
                    { loader: 'postcss-loader' }
                ],
                exclude: [path.resolve(config.srcDir, 'styles')],
                include: [config.srcDir]
            },
            {
                test: /\.scss$/,
                use: [
                    { loader: 'style-loader' },
                    {
                        loader: 'css-loader',
                        options: {
                            modules: true,
                            importLoaders: 1,
                        }
                    },
                    { loader: 'postcss-loader' },
                    {
                        loader: 'sass-loader',
                        options: {
                            includePaths: config.scssIncludes
                        }
                    }
                ],
                exclude: [path.resolve(config.srcDir, 'styles')],
                include: [config.srcDir]
            },
            // Global Styles
            {
                test: /\.css$/,
                use: [
                    ExtractCssChunks.loader,
                    'css-loader',
                    'postcss-loader'
                ],
                include: [path.resolve(config.srcDir, 'styles')]
            },
            {
                test: /\.scss$/,
                use: [
                    ExtractCssChunks.loader,
                    'css-loader',
                    'postcss-loader',
                    {
                        loader: 'sass-loader',
                        options: {
                            includePaths: config.scssIncludes
                        }
                    }
                ],
                include: [path.resolve(config.srcDir, 'styles')]
            },
            // Fonts
            {
                test: /\.(ttf|eot|woff|woff2)$/,
                loader: "file-loader",
                options: {
                    name: "fonts/[name].[ext]",
                }
            },
            // Files
            {
                test: /\.(jpg|jpeg|png|gif|svg|ico)$/,
                loader: "file-loader",
                options: {
                    name: "static/[name].[ext]",
                }
            }
        ]
    },
    devServer: {
        hot: true,
        contentBase: config.serveDir,
        compress: true,
        historyApiFallback: {
            index: BASE_PATH
        },
        host: '0.0.0.0',
        port: 3000
    }
}

以下是错误信息，好像可以找到css个文件但是不能解析，如果有人能帮忙请告诉我。

错误信息：

ERROR in ./node_modules/react-date-range/dist/styles.css 1:0
Module parse failed: Unexpected token (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> .rdrCalendarWrapper {
|   box-sizing: border-box;
|   background: #ffffff;
 @ ./app/index.js 8:0-42
 @ multi ./app/index.js

ERROR in ./node_modules/react-date-range/dist/theme/default.css 1:0
Module parse failed: Unexpected token (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> .rdrCalendarWrapper{
|   color: #000000;
|   font-size: 12px;
 @ ./app/index.js 10:0-49
 @ multi ./app/index.js

Answer 1

由于您从 node_modules 包加载 css 文件，但您将 css 加载器设置为 include 只有您的源路径。我建议要么删除它：

{
  test: /\.css$/,
  use: [
    ExtractCssChunks.loader,
    'css-loader',
    'postcss-loader'
  ],
},

或将更多包裹放入您的列表中，由您决定：

{
  test: /\.css$/,
  use: [
    ExtractCssChunks.loader,
    'css-loader',
    'postcss-loader'
  ],
  include: [path.resolve(config.srcDir, 'styles'), /node_modules/\react-date-range /]
},

CSS Webpack 配置中的加载程序无法正常工作

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