postcss v8 compatibility

therealgilles commented 3 years ago

Issue description

Running with postcss v8 generates the following warning due to the cssnano dependency:

cssnano: postcss.plugin was deprecated. Migration guide:
https://evilmartians.com/chronicles/postcss-8-plugin-migration

Technical info

  System:
    OS: macOS 11.3
    CPU: (8) x64 Intel(R) Core(TM) i5-8259U CPU @ 2.30GHz
    Memory: 56.98 MB / 8.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 15.8.0 - ~/.nvm/versions/node/v15.8.0/bin/node
    Yarn: 1.22.5 - ~/.yvm/shim/yarn
    npm: 7.5.1 - ~/.nvm/versions/node/v15.8.0/bin/npm
    Watchman: 4.7.0 - /usr/local/bin/watchman
  npmPackages:
    webpack: ^4.44.1 => 4.46.0 
    webpack-dev-server: ^3.11.2 => 3.11.2

Debug info

I use the module as a plugin used by razzle-plugin-bundle-analyzer. No options provided.

Stats.json file: stats.json.log

valscion commented 3 years ago

cssnano is in devDependencies, are you sure webpack-bundle-analyzer is the one that is giving you the cssnano warning?

therealgilles commented 3 years ago

Thanks for your response @valscion. Maybe I got it wrong, let me try to narrow it down.

th0r commented 3 years ago

@therealgilles try npm ls cssnano to check where does it come from. We use it only during a build step to compress styles so it can't be us.

webpack-contrib / webpack-bundle-analyzer