无法解决'babel-loader'

Question

我正在尝试配置我的第一个节点反应应用程序.

我一直收到一条错误,上面写着"无法解析babel-loader".

谷歌搜索该错误,我发现了一些不起作用的建议.

第一个是将以下内容添加到我的webpack.config.js中

// resolveLoader: {
  //       modulesDirectories: '/usr/local/lib/node_modules'
  //   },

尝试这会产生一个错误,说:

Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration.resolveLoader has an unknown property 'modulesDirectories'. These properties are valid:
   object { alias?, aliasFields?, cachePredicate?, descriptionFiles?, enforceExtension?, enforceModuleExtension?, extensions?, fileSystem?, mainFields?, mainFiles?, moduleExtensions?, modules?, plugins?, resolver?, symlinks?, unsafeCache?, useSyncFileSystemCalls? }

下一个建议是尝试:

resolveLoader: {
        fallback: '/usr/local/lib/node_modules'
    },

这会产生类似的错误.

有没有人对如何开始使用此配置有任何建议.理解文档很困难 - 每一句话都是行话,我找不到一个参考点来找到对这个设置开始时需要做些什么的基本理解.

Webpack.config.js是:

module.exports = {
  entry: './app/app.jsx',
  output: {
    path: __dirname,
    filename: './public/bundle.js'
  },

  resolve: {
    modules: [__dirname, 'node_modules'],
    alias: {
      Greeter: 'app/components/Greeter.jsx',
      GreeterMessage: 'app/components/GreeterMessage.jsx',
      GreeterForm: 'app/components/GreeterForm.jsx',

    },
    extensions: ['.js', '.jsx']
  },

  // resolveLoader: {
  //       fallback: '/usr/local/lib/node_modules'
  //   },

  module :{
    rules:[{
      // use : 'babel-loader',
      loader: 'babel-loader',
      query :{
        presets:['react','es2015']
        // ,'es2017'
      },
      test: /\.jsx?$/,
      exclude: /(node_modules|bower_components)/
    }
   ]
 }


};

Answer 1

我有同样的问题; 我通过安装babel-loader模块修复它:

yarn add babel-loader

要么

npm install babel-loader