rails webpack-dev-server "Invalid Configuration object"

Question

当我尝试运行./bin/webpack-dev-server时，我得到这个：

Invalid configuration object. Webpack has been initialised using a configuration object that does not match the API schema.
 - configuration has an unknown property 'mode'. These properties are valid:
   object { amd?, bail?, cache?, context?, dependencies?, devServer?, devtool?, entry, externals?, loader?, module?, name?, node?, output?, parallelism?, performance?, plugins?, profile?, recordsInputPath?, recordsOutputPath?, recordsPath?, resolve?, resolveLoader?, stats?, target?, watch?, watchOptions? }
   For typos: please correct them.
   For loader options: webpack 2 no longer allows custom properties in configuration.
     Loaders should be updated to allow passing options via loader options in module.rules.
     Until loaders are updated one can use the LoaderOptionsPlugin to pass these options to the loader:
     plugins: [
       new webpack.LoaderOptionsPlugin({
         // test: /.xxx$/, // may apply this only for some modules
         options: {
           mode: ...
         }
       })
     ]

我很确定这是打乱了软件包版本。是否有我可以运行的"重新安装所有内容"命令？

我的版本是

webpack-dev-server@3.4.1

@rails/webpacker@3.5.5

Answer 1

很可能

是webpacker.yml的问题。
就我而言source_path不正确。

请参阅：启动 webpack-dev-server 时配置对象无效