为什么加了exclude之后就报了很多错误呢？ 这样写： exclude:__dirname+'/node_modules/', 这样写：  exclude:'./node_modules/', 这样写：  exclude:__dirname+/node_modules/, 这样写：  exclude:/node_modules/, 都不行 错误如下：

Invalid configuration object. Webpack has been initialised using a configur

 object that does not match the API schema.

 - configuration.module.rules[0].use should be one of these:

   non-empty string | function | object { loader?, options?, query? } | fun

 | [non-empty string | function | object { loader?, options?, query? }]

   Details:

    * configuration.module.rules[0].use should be a string.

    * configuration.module.rules[0].use should be an instance of function.

    * configuration.module.rules[0].use has an unknown property 'exclude'.

 properties are valid:

      object { loader?, options?, query? }

    * configuration.module.rules[0].use has an unknown property 'include'.

 properties are valid:

      object { loader?, options?, query? }

    * configuration.module.rules[0].use should be one of these:

      non-empty string | function | object { loader?, options?, query? }

    * configuration.module.rules[0].use should be an instance of function.

    * configuration.module.rules[0].use should be an array:

      [non-empty string | function | object { loader?, options?, query? }]