Webpack配置中的CSS加载器无法正常工作

问题描述

我正在尝试集成https://www.npmjs.com/package/react-date-range 当我导入CSS文件时，它会出现加载程序问题。 我的webpack文件和错误消息如下所示。感谢您提供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$/,{ loader: 'postcss-loader' },{
                        loader: 'sass-loader',options: {
                            includePaths: config.scssIncludes
                        }
                    }
                ],// Global Styles
            {
                test: /\.css$/,use: [
                    ExtractCssChunks.loader,'css-loader','postcss-loader'
                ],include: [path.resolve(config.srcDir,'styles')]
            },'postcss-loader',// Fonts
            {
                test: /\.(ttf|eot|woff|woff2)$/,loader: "file-loader",options: {
                    name: "fonts/[name].[ext]",}
            },// Files
            {
                test: /\.(jpg|jpeg|png|gif|svg|ico)$/,options: {
                    name: "static/[name].[ext]",}
            }
        ]
    },devServer: {
        hot: true,contentBase: config.serveDir,compress: true,historyApiFallback: {
            index: BASE_PATH
        },host: '0.0.0.0',port: 3000
    }
}

以下是错误消息，似乎它可以找到css文件但无法解析它，让我知道是否有人可以提供帮助。

错误消息：

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

解决方法

由于您是从node_modules包中加载css文件，但是仅将include的css loader设置为源路径。我建议将其删除：

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

或者将更多包裹放入您的列表，这取决于您：

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