This is a notice for the upcoming 1.34 release which provides support for using PostCSS as well as PurgeCSS.

If you want to make use of the new PostCSS feature, you will need to add a file called postcss.config.js to the root of your project with following contents:

const atImport = require('postcss-import');
const autoprefixer = require('autoprefixer');

module.exports = [atImport, autoprefixer];

This manual update is needed because the upgrade mechanism from bedrock-cli only upgrades the core folder.

If you update an old project it is also wortwhile to copy/paste the new dependencies, because that also doesn’t get updated automatically. Truth be told, we could do better in terms of upgradeability. If you are stuck with anything, please file a Github issue and we can try to help.