Summary

BREAKING CHANGE: remove built-in autoprefixer and tools.autoprefixer configuration.

Rsbuild now uses Lightning CSS to transform CSS files and adds vendor prefixes, so we no longer need the built-in autoprefixer.

Considering that Lightning CSS has some uncovered edge cases, you can still enable autoprefixer via the postcss configuration file:

// postcss.config.cjs
module.exports = {
  plugins: {
    autoprefixer: {},
  }
}

Related Links

#3034

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).