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Use this tag for questions specific to features in Webpack 4. When using this tag, also include the more generic [webpack] tag where possible.

Use this tag for questions specific to features in Webpack 4. For general Webpack questions, the correct tag is .

Webpack 4 Big changes:

  • 4 is no longer supported.
  • configuration modes (--mode): production or development
  • configuration updates (plugins substitution by optimization config.)
    • NoEmitOnErrorsPlugin -> optimization.noEmitOnErrors
    • ModuleConcatenationPlugin -> optimization.concatenateModules
    • NamedModulesPlugin -> optimization.namedModules
    • CommonsChunkPlugin was removed -> optimization.splitChunks, optimization.runtimeChunk
  • native support
    • add type: "javascript/auto" when transforming JSON via loader to JS

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