我无法正常工作 webpack

Question

我收到了这条消息，请帮助...提前致谢。 ...

    Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration.module has an unknown property 'loaders'. These properties are valid:
   object { exprContextCritical?, exprContextRecursive?, exprContextRegExp?, exprContextRequest?, noParse?, rules?, defaultRules?, unknownContextCritical?, unknownContextRecursive?, unknownContextRegExp?, unknownContextRequest?, unsafeCache?, wrappedContextCritical?, wrappedContextRecursive?, wrappedContextRegExp?, strictExportPresence?, strictThisContextOnImports? }
   -> Options affecting the normal modules (`NormalModuleFactory`).
 - configuration.resolve.extensions[0] should not be empty.
   -> A non-empty string

我在 webpack 中的配置是这样的，我还在试图弄清楚为什么会这样……我的文件是这样的：https://github.com/NodeioLabs/Theatherflix/blob/master/webpack.config.js

Answer 1

从第 7-14 和 37-46 行，您注意到：

  resolve: {
    root: __dirname,
    alias: {
      Main: 'app/components/Main.jsx',
      Nav: 'app/components/Nav.jsx'
    },
    extensions: ['', '.js', '.jsx']
  },

和

  resolve: {
    root: __dirname,
    alias: {
      Main: 'app/components/Main.jsx',
      Nav: 'app/components/Nav.jsx',
      ListM: 'app/components/ListM.jsx',
      About: 'app/components/About.jsx'
    },
    extensions: ['', '.js', '.jsx']
  },

webpack不接受的，建议你使用webpack resolve.extensions推荐的

resolve.extensions

数组

自动解析某些扩展。这默认为：

extensions: [".js", ".json"]

这里：

    root: __dirname,
    alias: {
      Main: 'app/components/Main.jsx',
      Nav: 'app/components/Nav.jsx',
      ListM: 'app/components/ListM.jsx',
      About: 'app/components/About.jsx'
    },

按照webpack #resolve-alias的建议改用这种格式

alias: {
  Main : path.resolve(__dirname, 'app/components/Main'),
  Nav: path.resolve(__dirname, 'app/components/Nav'),
  ListM: path.resolve(__dirname, 'app/components/ListM'),
  About: path.resolve(__dirname, 'app/components/About')
},

我希望这会有所帮助。

Answer 2

让我们单独看一下消息：

1. configuration.module has an unknown property 'loaders'.

   表示您目前拥有：

   {
     module: {
       loaders: {}
     }
   }
   

   因此将loaders 更改为rules（根据webpack documentation）：

   {
     module: {
       rules: {}
     }
   }
   

2. configuration.resolve.extensions[0] should not be empty.

   表示你有：

   {
     resolve: {
       extensions: ['']
     }
   }
   

   所以从extensions中删除空字符串：

   {
     resolve: {
       extensions: []
     }
   }
   

Answer 3

我一直在努力寻找答案……我不得不进行大量研究。但是，我找到了答案，或者我找到了解决这种情况的方法：

首先：创建一个文件.babel-rc

    /* 
    ./.babelrc
*/  
{
    "presets":[
        "es2015", "react"
    ]
}

也可以考虑这个包 json 文件：

{
  "name": "theatherflix",
  "description": "",
  "main": "server.js",
  "scripts": {
    "webpack": "webpack --progress",
    "test": "echo \"Error: no test specified\" && exit 1",
    "build": "webpack --config webpack.config.js"
  },
  "author": "Nodeio Labs",
  "license": "GPL-3",
  "dependencies": {
    "@babel/preset-react": "^7.0.0-beta.51",
    "axios": "^0.18.0",
    "babel": "^6.23.0",
    "docker": "^1.0.0",
    "express": "^4.13.4",
    "extract-text-webpack-plugin": "^3.0.2",
    "find-process": "^1.1.0",
    "loader": "^2.1.1",
    "material-ui": "^0.20.1",
    "modules": "^0.4.0",
    "path": "^0.12.7",
    "react": "^0.14.7",
    "react-dom": "^0.14.7",
    "react-router": "^2.0.0",
    "redux": "^4.0.0",
    "redux-thunk": "^2.2.0",
    "ts-loader": "^4.4.1",
    "uuid": "^3.2.1",
    "webpack-dev-server": "^3.1.4"
  },
  "devDependencies": {
    "@babel/core": "^7.0.0-beta.51",
    "@babel/preset-env": "^7.0.0-beta.51",
    "babel-cli": "^6.26.0",
    "babel-core": "^6.26.3",
    "babel-loader": "^7.1.4",
    "babel-preset-es2015": "^6.24.1",
    "babel-preset-react": "^6.24.1",
    "babel-preset-stage-0": "^6.5.0",
    "fuse-box": "^3.2.2",
    "gulp-babel": "^7.0.1",
    "jsx-loader": "^0.13.2",
    "node-sass": "^4.9.0",
    "typescript": "^2.9.2",
    "webpack": "^4.12.0",
    "webpack-cli": "^3.0.2"
  }
}

*在这个模块包中使用你需要的东西。

然后我更正了我的 webpack 中的几行：

/*
    ./webpack.config.js
*/
const path = require('path');
module.exports = {
  mode: "none", 
  entry: './app/app.jsx',
  output: {
    path: path.resolve('public'),
    filename: 'bundle.js'
  },
  module: {
    rules: [{
        test: /\.css$/,
        use: [{
            loader: "style-loader"
          },
          {
            loader: "css-loader"
          }
        ]
      },
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: "babel-loader"
      }, {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: "babel-loader"
      }
    ]
  }
}

这是我的 app.jsx ：

var React = require('react');
var ReactDOM = require('react-dom');
var {Route, Router, IndexRoute, Main, About, MovieList, hashHistory} = require('react-router');
var Main = require('./components/Main.jsx');
var MovieList = require('./components/MovieList/MovieList.jsx');
var About = require('./components/About/About.jsx');
//import './app.scss';

ReactDOM.render(
  <Router history={hashHistory}>
    <Route path="/" component={Main}>
    <Route path="about" component={About}/>
          <IndexRoute component={MovieList}/>
    </Route>
  </Router>,
  document.getElementById('app')
);

我希望它可能对其他人有所帮助。