What about the options.outputStyle parameter?

[silversonicaxel]

I upgraded the sass-loader from version 7.1.0 to version 8.0.0

The webpack configuration was the following (sass loader 7.1.0)

       {
        loader: 'sass-loader',
        options: {
          outputStyle: 'compressed',
          sourceMap: true
        }
      }

After migrating I have this issue:

ValidationError: Invalid options object. Sass Loader has been initialised using an options object that does not match the API schema.
[build:css] [build:css:MYTHEME]  - options has an unknown property 'outputStyle'. These properties are valid:
[build:css] [build:css:MYTHEME]    object { implementation?, sassOptions?, prependData?, sourceMap?, webpackImporter? }

I was wondering what should be the new configuration (sass loader 8.0.0)

       {
        loader: 'sass-loader',
        options: {
          sassOptions: {
            outputStyle: 'compressed'
          }
          sourceMap: true
        }
      }

If that's correct, I would be more specific in the README at this comment

ℹ In some rare cases node-sass can output invalid source maps (it is a node-sass bug). In order to avoid this, you can try to update node-sass to latest version or you can try to set the outputStyle option to compressed.

[alexander-akait]

Feel free to send a PR to docs

[silversonicaxel]

Created here, thanks #780