parcel-bundler/parcel v2.9.0

on GitHub

Parcel v2.9.0 includes many long requested features, including a brand new resolver with support for package.json "exports" and tsconfig.json features, support for ESM plugins and configs, and local Parcel plugins. It also improves performance with a new default JS minifier powered by SWC, incremental symbol propagation, and improved bundler data structures.

Blog post: https://parceljs.org/blog/v2-9-0/

Added

• Core

  • Add support for ESM plugins and configs – Details
  • Add support for local parcel plugins – Details
  • Incremental Symbol Propagation for improved performance and improved export errors in development – Details
  • Add support for plugin tracing, which shows where time is being spent during a Parcel build – Details
  • Support .proxyrc.cjs config files – Details
  • Add support for loadConfig function to resolver plugins – Details

• Resolver

  • New resolver implementation in Rust supporting package.json "exports" and "imports", and tsconfig.json "baseUrl", "paths", and "moduleSuffixes" – Details

• JavaScript

  • Switch to SWC minifier instead of Terser by default – Details
  • Split large runtime manifest into separate bundles to reduce cache invalidations – Details
  • Respect addExternalDependency in Babel plugins – Details

• Bundler

  • Use BitSet for bundler intersections for improved performance – Details

• Web Extensions

  • Add support for chrome_style field – Details

Fixed

• Core

  • Improve error message when bundles do not have unique file names – Details
  • Bump napi-rs to latest – Details, Details
  • Fix pnpm autoinstall – Details
  • Fix "does not exports" error for multiple assets returned by transformers – Details
  • Remove v8-compile-cache – Details
  • Update fast-glob – Details
  • Update lmdb – Details
  • Fixup DiagnosticCodeHighlight and SourceLocation columns – Details
  • Bump fastest-levenshtein and xmldom dependencies – Details

• JavaScript

  • Sort global deps before injecting imports to reduce cache invalidations – Details
  • Only add export setter for non-ESM exports – Details
  • Bump SWC – Details, Details, Details, Details,
    Details
  • Deduplicate imports in hoist transformer – Details
  • Allow buffer polyfill v5 or v6 – Details
  • Fix packaging of synchronous reused bundles – Details
  • Support eslint ^7.0.0 in @parcel/validator-eslint – Details
  • Improve inlineEnvironment performance – Details
  • Hoist exports to allow circular dependencies – Details

• TypeScript

  • Throw diagnostics as error on empty emit - Details

• CSS

  • Sort CSS module exports to reduce cache invalidations – Details

• Bundler

  • Fix missing edge error when using for multiple targets – Details
  • Fix non-deterministic builds between project directories – Details
  • Fix css-module related build error in bundling – Details
  • Fix multiple entries pointing to wrong bundle in dist – Details

• Dev server

  • Don't error during HMR on <link> elements without hrefs – Details
  • Improve server index file matching – Details
  • Don't send HMR updates before packaging in watch mode – Details

• Elm

  • Fix error when formatting build errors – Details