• BabelConfig.fetchBabelRc / static BabelConfig.default / static BabelConfig.generate have all been deprecated. They are no longer used by Mix itself but remain for backwards compatability.
• MixDefinitionsPlugin.getDefinitions and static MixDefinitionsPlugin.build have been deprecated. They are no longer used by Mix itself but remain for backwards compatability.
• static Chunks._instance / static Chunks.instance() / static Chunks.reset() are now deprecated and will be removed in a future release.
• The static methods on HotReloading are now deprecated. They have been replaced with instance methods.
• The use of the globals Mix, Config, and webpackConfig are now deprecated and will warn on use in Mix v7.

We are working toward an API for access to Mix for extensions that does not assume that it is a global or that it is the same instance in all cases.

In the mean time:

• Uses of Chunks.instance() may be replaced with Mix.chunks
• Uses of Config may be replaced with Mix.config
• Uses of webpackConfig may be replaced with Mix.webpackConfig
• Uses of HotReloading.* methods Mix.hot.*

View upgrade guide.

• Support for webpack 5
• New npx mix executable for triggering your build
• Support for Vue 3 applications
• Support for PostCSS 8
• New mix.vue() and mix.react() commands
• New mix.alias() command (Learn More)
• Support for changing the webpack manifest output path (Learn More)
• New mix.before() hook (Learn More)
• Improved mix.combine() wildcard support
• Improved mix.extract() priority and tree-shaking logic

• Fixed "empty CSS file" extraction bug when using dynamic imports
• Fixed mix.ts() TypeScript bug that skipped Babel transformation in certain cases
• Fixed and improved PostCSS plugin autoloading and merging
• Fixed an issue related to hot module reloading when versioning is enabled
• Added TypeScript types for API