无效的配置对象。已使用与API模式不匹配的配置对象初始化了Webpack

Z时代
2024-01-10
分类：问答

我有一个通过在线课程创建的简单的helloworld react应用，但是出现此错误：

无效的配置对象。已使用与API模式不匹配的配置对象初始化Webpack。-配置具有未知属性“
postcss”。这些属性是有效的：对象{amd，bail，cache，context，dependencies，devServer，devtool，入口，外部，加载程序，模块，名称，节点，输出，性能。
，插件，配置文件，recordsInputPath，records
utputPath，recordsPath，resolve，resolveLoader，stats，target，watch，watchOptions？}对于错别字：请更正它们。
对于加载程序选项：webpack
2不再允许配置中的自定义属性。应该更新加载程序，以允许通过module.rules中的加载程序选项传递选项。在更新加载程序之前，可以使用LoaderOptionsPlugin将这些选项传递给加载程序：插件：[new
webpack.LoaderOptionsPlugin（{//测试：/.xxx$/，//可能仅将此功能应用于某些模块选项：{postcss：
…}}）]-configuration.resolve具有未知属性’root’。这些属性是有效的：object
{alias？，aliasFields？，cachePredicate？，descriptionFiles？，forceExtension？，forceforceModuleExtension？，extensions，fileSystem？，mainFields，mainFiles？，moduleExtensions？，modules？，plugins？，resolver
?、符号链接？，unsafeCache ?,
useSyncFileSystemCalls？}-configuration.resolve.extensions [0]不能为空。

我的webpack文件是：

// work with all paths in a cross-platform manner
const path = require('path');
// plugins covered below
const { ProvidePlugin } = require('webpack');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
// configure source and distribution folder paths
const srcFolder = 'src';
const distFolder = 'dist';
// merge the common configuration with the environment specific configuration
module.exports = {
    // entry point for application
    entry: {
        'app': path.join(__dirname, srcFolder, 'ts', 'app.tsx')
    },
    // allows us to require modules using
    // import { someExport } from './my-module';
    // instead of
    // import { someExport } from './my-module.ts';
    // with the extensions in the list, the extension can be omitted from the 
    // import from path
    resolve: {
        // order matters, resolves left to right
        extensions: ['', '.js', '.ts', '.tsx', '.json'],
        // root is an absolute path to the folder containing our application 
        // modules
        root: path.join(__dirname, srcFolder, 'ts')
    },
    module: {
        loaders: [
            // process all TypeScript files (ts and tsx) through the TypeScript 
            // preprocessor
            { test: /\.tsx?$/,loader: 'ts-loader' },
            // processes JSON files, useful for config files and mock data
            { test: /\.json$/, loader: 'json' },
            // transpiles global SCSS stylesheets
            // loader order is executed right to left
            {
                test: /\.scss$/,
                exclude: [path.join(__dirname, srcFolder, 'ts')],
                loaders: ['style', 'css', 'postcss', 'sass']
            },
            // process Bootstrap SCSS files
            {
                test: /\.scss$/,
                exclude: [path.join(__dirname, srcFolder, 'scss')],
                loaders: ['raw', 'sass']
            }
        ]
    },
    // configuration for the postcss loader which modifies CSS after
    // processing
    // autoprefixer plugin for postcss adds vendor specific prefixing for
    // non-standard or experimental css properties
    postcss: [ require('autoprefixer') ],
    plugins: [
        // provides Promise and fetch API for browsers which do not support
        // them
        new ProvidePlugin({
            'Promise': 'es6-promise',
            'fetch': 'imports?this=>global!exports?global.fetch!whatwg-fetch'
        }),
        // copies image files directly when they are changed
        new CopyWebpackPlugin([{
            from: path.join(srcFolder, 'images'),
            to: path.join('..', 'images')
        }]),
        // copies the index.html file, and injects a reference to the output JS 
        // file, app.js
        new HtmlWebpackPlugin({
            template: path.join(__dirname, srcFolder, 'index.html'),
            filename:  path.join('..', 'index.html'),
            inject: 'body',
        })
    ],
    // output file settings
    // path points to web server content folder where the web server will serve 
    // the files from file name is the name of the files, where [name] is the 
    // name of each entry point 
    output: {
        path: path.join(__dirname, distFolder, 'js'),
        filename: '[name].js',
        publicPath: '/js'
    },
    // use full source maps
    // this specific setting value is required to set breakpoints in they
    // TypeScript source in the web browser for development other source map
    devtool: 'source-map',
    // use the webpack dev server to serve up the web application
    devServer: {
        // files are served from this folder
        contentBase: 'dist',
        // support HTML5 History API for react router
        historyApiFallback: true,
        // listen to port 5000, change this to another port if another server 
        // is already listening on this port
        port: 5000,
        // proxy requests to the JSON server REST service
        proxy: {
            '/widgets': {
                // server to proxy
                target: 'http://0.0.0.0:3010'
            }
        }
    }
};

回答：

我不完全知道是什么原因造成的，但是我以这种方式解决了。

重新安装整个项目，但请记住必须全局安装webpack-dev-server。

我遍历了一些找不到webpack的服务器错误，因此我使用link命令链接了Webpack。

在输出中解决一些绝对路径问题。

在devServer中 object: inline: false

webpack.config.js

module.exports = {
    entry: "./src/js/main.js",
    output: {
        path:__dirname+ '/dist/',
        filename: "bundle.js",
        publicPath: '/'
    },
    devServer: {
        inline: false,
        contentBase: "./dist",
    },
    module: {
        loaders: [
            {
                test: /\.jsx?$/,
                exclude:/(node_modules|bower_components)/,
                loader: 'babel-loader',
                query: {
                    presets: ['es2015', 'react']
                }
            }
        ]
    }
};

package.json

{
  "name": "react-flux-architecture-es6",
  "version": "1.0.0",
  "description": "egghead",
  "main": "index.js",
  "scripts": {
    "start": "webpack-dev-server"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/cichy/react-flux-architecture-es6.git"
  },
  "keywords": [
    "React",
    "flux"
  ],
  "author": "Jarosław Cichoń",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/cichy/react-flux-architecture-es6/issues"
  },
  "homepage": "https://github.com/cichy/react-flux-architecture-es6#readme",
  "dependencies": {
    "flux": "^3.1.2",
    "react": "^15.4.2",
    "react-dom": "^15.4.2",
    "react-router": "^3.0.2"
  },
  "devDependencies": {
    "babel-core": "^6.22.1",
    "babel-loader": "^6.2.10",
    "babel-preset-es2015": "^6.22.0",
    "babel-preset-react": "^6.22.0"
  }
}