1.4、sass及图片处理

npm i sass-loader node-sass -S
npm i file-loader url-loader -S

module:{
  rules:[
    {
      test:/\.scss$/,
      use:[
        'style-loader',
        'css-loader',
        'sass-loader'
      ]
    },
    {
      test:/\.(gif|jpg|jpeg|png|svg)$/,
      use:[
        {
          loader:'url-loader',
          options:{
            limit:1024,
            name:'[name]-[hash].[ext]'
          }
        }
      ]
    }
}