Javascript 您可能需要适当的加载程序来处理此文件类型。使用ckeditor5 online builder创建react应用程序

我得到以下错误 在我的申请上。找不到此处的错误配置

create react应用程序中的webpack.config.js

'use strict';

const autoprefixer = require('autoprefixer');
const path = require('path');
const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const CaseSensitivePathsPlugin = require('case-sensitive-paths-webpack-plugin');
const InterpolateHtmlPlugin = require('react-dev-utils/InterpolateHtmlPlugin');
const WatchMissingNodeModulesPlugin = require('react-dev-utils/WatchMissingNodeModulesPlugin');
const eslintFormatter = require('react-dev-utils/eslintFormatter');
const ModuleScopePlugin = require('react-dev-utils/ModuleScopePlugin');
const getClientEnvironment = require('./env');
const paths = require('./paths');
const publicPath = '/';
const publicUrl = '';
const env = getClientEnvironment(publicUrl);
module.exports = {
  devtool: 'cheap-module-source-map',
  entry: [
    require.resolve('./polyfills'),
    require.resolve('react-dev-utils/webpackHotDevClient'),
    paths.appIndexJs,

  ],
  output: {

    pathinfo: true,

    filename: 'static/js/bundle.js',

    chunkFilename: 'static/js/[name].chunk.js',

    publicPath: publicPath,

    devtoolModuleFilenameTemplate: info =>
      path.resolve(info.absoluteResourcePath).replace(/\\/g, '/'),
  },
  resolve: {

    modules: ['node_modules', paths.appNodeModules].concat(

      process.env.NODE_PATH.split(path.delimiter).filter(Boolean)
    ),

    extensions: ['.web.js', '.mjs', '.js', '.json', '.web.jsx', '.jsx'],
    alias: {
      
      'react-native': 'react-native-web',
    },
    plugins: [
      new ModuleScopePlugin(paths.appSrc, [paths.appPackageJson]),
    ],
  },
  module: {
    strictExportPresence: true,
    rules: [

      {
        test: /\.(js|jsx|mjs)$/,
        enforce: 'pre',
        use: [
          {
            options: {
              formatter: eslintFormatter,
              eslintPath: require.resolve('eslint'),
              
            },
            loader: require.resolve('eslint-loader'),
          },
        ],
        include: paths.appSrc,
      },
      {
        oneOf: [
          {
            test: [/\.bmp$/, /\.gif$/, /\.jpe?g$/, /\.png$/],
            loader: require.resolve('url-loader'),
            options: {
              limit: 10000,
              name: 'static/media/[name].[hash:8].[ext]',
            },
          },

          {
            test: /\.(js|jsx|mjs)$/,
            include: paths.appSrc,
            loader: require.resolve('babel-loader'),
            options: {
              
              cacheDirectory: true
            },
          },

          {
            test: /\.css$/,
            use: [
              require.resolve('style-loader'),
              {
                loader: require.resolve('css-loader'),
                options: {
                  importLoaders: 1,
                },
              },
              {
                loader: require.resolve('postcss-loader'),
                options: {
                  ident: 'postcss',
                  plugins: () => [
                    require('postcss-flexbugs-fixes'),
                    autoprefixer({
                      browsers: [
                        '>1%',
                        'last 4 versions',
                        'Firefox ESR',
                        'not ie < 9', // React doesn't support IE8 anyway
                      ],
                      flexbox: 'no-2009',
                    }),
                  ],
                },
              },
            ],
          },
          {
            exclude: [/\.(js|jsx|mjs)$/, /\.html$/, /\.json$/],
            loader: require.resolve('file-loader'),
            options: {
              name: 'static/media/[name].[hash:8].[ext]',
            },
          },
        ],
      },

    ],
  },
  plugins: [

    new InterpolateHtmlPlugin(env.raw),

    new HtmlWebpackPlugin({
      inject: true,
      template: paths.appHtml,
    }),
    new webpack.NamedModulesPlugin(),
    new webpack.DefinePlugin(env.stringified),

    new webpack.HotModuleReplacementPlugin(),

    new CaseSensitivePathsPlugin(),

    new WatchMissingNodeModulesPlugin(paths.appNodeModules),

    new webpack.IgnorePlugin(/^\.\/locale$/, /moment$/),

    new webpack.ProvidePlugin({
      jQuery: 'jquery',
      $: 'jquery',
      "window.jQuery": "jquery"
     }),
  ],
  node: {
    dgram: 'empty',
    fs: 'empty',
    net: 'empty',
    tls: 'empty',
    child_process: 'empty',
  },
  performance: {
    hints: false,
  },
};

安装的依赖项

• “@babel/core”：“^7.12.3”
• “@ckeditor/ckeditor5 react”：“^1.1.0”
• “@wiris/mathtype-ckeditor5”：“^7.24.1”
• “babel eslint”：“7.2.3”
• “巴别塔笑话”：“20.0.3”
• “巴别塔装载机”：“7.1.2”
• “巴别塔预设反应应用程序”：“^9.1.2”
• “巴别塔运行时”：“6.26.0”
• “@babel/preset env”：“^7.12.1”
• “@babel/preset react”：“^7.12.1”
• “巴别塔核心”：“^7.0.0-bridge.0”

不知道出了什么问题。这个问题有什么解决办法吗

 "babel": {
    "presets": [
      "@babel/preset-env",
      "@babel/preset-react"
    ],
    "plugins": [
      [
        "@babel/plugin-proposal-class-properties"
      ]
    ]
  }