v2.10.0

Parcel v2.10.0 includes big performance improvements, an improved --lazy mode, reduced runtime bundle sizes, web extension improvements, and tons of bug fixes and improvements.

Added

• Core

  • Add support for include and exclude globs for --lazy mode – Details, Details
  • Merge all native Rust modules into one package – Details
  • Add async resolver and JS transformer functions using rayon – Details
  • Support "register" tools in module loader (e.g. @babel/register, esbuild-register, ts-node) – Details
  • Limit default number of JS workers to 4 to improve memory usage/performance – Details

• Bundler

  • Optimize bundler performance – Details
  • Add disableSharedBundles config option – Details

• Resolver

  • Support node: prefix for CJS dependencies – Details, Details

• JavaScript

  • Add import helper to decrease ESM loader runtime footprint – Details
  • Support parallel bundle imports in libraries – Details
  • Only include globalThis polyfill for old browsers – Details
  • Updated parcelRequire.register to be minifiable – Details

• CSS

  • Add include and exclude globs for CSS modules – Details

• WASM

  • Add WASM packager with source map support – Details

• XML

  • Transform xml-stylesheet processing instructions – Details

• Web Extensions

  • Add support for Chrome Extension manifest V3 side_panel property – Details
  • Improve HMR for web extensions – Details

• Web Manifest

  • Add support for icons in file_handlers – Details

Fixed

• Core

  • Query glibc version only once to speed up JSTransformer on Linux – Details
  • Refresh cache before writing contents to bundle – Details
  • Fix --lazy mode bugs – Details
  • Ignore no-opt command line option – Details
  • Bump lmdb – Details
  • Don't hide error when diagnostic is malformed – Details
  • Don't autoinstall local files in package manager – Details
  • Fix bug with cache and glob entries – Details

• JavaScript

  • Migrate to swc_core – Details
  • Move ESM loader runtime to absolute URLs – Details
  • Fix duplicate asset references – Details
  • Bump swc – Details, Details, Details
  • Fix shorthand identifier import usage – Details
  • Ensure nested member expressions are marked used in dev mode – Details
  • Set ascii_only for swc emit – Details
  • Add tests for non-identifier symbol names – Details

• Bundler

  • Exclude inline assests from parallel request limit – Details
  • Fix unexpected undefined when creating shared bundles – Details

• Images

  • Bump oxipng from 6.0.0 -> 8.0.0 – Details

• Sass

  • Fix sass import edge case – Details

• Dev Server

  • Fix index page loading in dev server when bundle type isn't html – Details

Unstable

• Core

  • Expose unstable_transform and unstable_resolve APIs – Details

• Bundler

  • Add unstable manual shared bundles config – Details

• JavaScript

  • Experimental inline / deferred requires optimiser – Details
  • Add constants inlining optimization – Details
  • Add unstable async bundle runtime to the JS Packager – Details