Webpack loader configuration

webpack.config.js

module.exports = {
  entry:’./app.js’,
  output:{
    filename:’bundle.js’,
    path:’./build’
  },
  module:{
    loaders:[
     {
       test:regexp_here,
        loaders:[
          'loader-1',
          'loader-2?a=b&c=d'
        ]
      }
    ]
  }
}