Question

我从复数课程学习webpack。我使用的是作者的package.json文件。

如果我只运行webpack命令就可以正常运行。

如果我运行webpack-dev-server，我会得到以下内容：

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

这是我的webpack.config.js：

module.exports = {
    entry: ["./utils", "./app.js"],
    output: {
        filename: "bundle.js"
    },

    module: {
        preLoaders: [
            {
                test: /\.js$/,
                exclude: 'node_modules',
                loader: 'jshint-loader'
            }
        ],
        loaders: [
            {
                test: /\.es6$/,
                exclude: /node_modules/,
                loader: "babel-loader"
            }
        ]
    },

    resolve: {
        extensions: ['', '.js', '.es6']
    }
}

我的package.json：

  "devDependencies": {
    "babel-core": "^6.2.1",
    "babel-loader": "^6.2.0",
    "babel-preset-es2015": "^6.1.18",
    "jshint": "^2.8.0",
    "jshint-loader": "^0.8.3",
    "node-libs-browser": "^0.5.3",
    "webpack": "^1.12.9"
  }

Answer 1

您尝试使用webpack1的配置运行webpack2 - 您需要确保全局安装了webpack1，因为您的课程是在webpack1上 - 而不是webpack 2

Answer 2

如果您想坚持使用Webpack 2，您可以更新您的webpack.config.js

你不需要Webpack 2中的空扩展名，所以你在哪里

resolve: {
    extensions: ['', '.js', '.es6']
}

需要更改为：

resolve: {
    extensions: ['.js', '.es6']
}

为什么我在webpack上获得无效的配置对象？

2 个答案: