ERROR in Entry module not found Error Can't resolve 'babel' in ' Use

  //babel 的配置， ES6 与React
  module: {
    loaders: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        loader: 'babel-loader', //修改这里， 原来写的是babel。 
        query: {
          presets: ['es2015','react']
        }
      }
    ]
  }

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