v2.10.1

Fixed

• Core

  • Use modern node versions in CI Details
  • Support multiple workspaces/clients in Parcel for VSCode Details

• Bundler

  • Make sure to set unique key Details
  • Fix bundler tests assertions on Windows Details

• JavaScript

  • Add logic to disable scope hoisting if the this key word is pointing to an export module Details
  • Detect TSC polyfills to avoid marking them as CJS Details
  • Remove this exports tracking for files with module syntax Details
  • Bump swc Details

Unstable

• Bundler

  • Fix inline constants in shared bundles Details
  • Use Manual "name" for publicIds, remove source bundles from Unique Keys Details
  • Simplify MSB code for code split bundle creation section Details

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

v2.9.3

Fixed

• Resolver

  • Fix the development and production package conditions – Details

• JavaScript

  • Update SWC to fix generics in JSX elements – Details

v2.9.2

Fixed

• Core
  • Fix infinite loop when entries look like globs – Details
  • Fix proxyrc require from path – Details
• JavaScript
  • Treat re-exports of * from empty files with sideEffects: false as ESM – Details
• CSS
  • Fix self references error in CSS module JS assets causing "Bundle group cannot have more than one entry bundle of the same type" – Details
• Dev server
  • Serve folder's index when requesting folder without slash – Details
• Web extensions
  • Allow source maps files in webextension – Details
• Image
  • Add core as peerdep to image optimizer – Details

v2.9.1

Fixed

• Resolver
  • Ignore invalid package.json "type" field values – Details
  • Ignore duplicate slashes at the start of relative path specifiers – Details

v2.9.0

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

v2.8.3

• Core
  • filter out title execArgv to workers – Details
• Bundler
  • Fix CSS order when merging type change bundles – Details
  • Fix assertion error when mixing CSS modules and non-modules – Details
  • Fix set diff – Details
  • Recursively check reachability when removing asset graphs from bundles in deduplication – Details
• JavaScript
  • Don't retarget dependencies if a symbol is imported multiple times with different local names – Details
  • Fix assigning to this in CommonJS – Details
  • Bump SWC to fix dead branch removal bug – Details
  • Bump swc to fix sourcemaps with Windows line endings – Details
  • Add test cases for ESM initialization problems – Details
• TypeScript
  • Fix TSC sourcemaps metadata – Details
• HTML
  • Fix srcset parsing – Details
• Dev server
  • Apply HMR updates in topological order – Details
  • Fixed the hmr connection with host 0.0.0.0 – Details

v2.8.2

Fixed

• Core
  • Ensure maxListeners for process.stdout accounts for workers – Details
• JavaScript
  • Bump SWC to fix scoping issue with block-less loops – Details
  • Fix requires of external CommonJS SWC helpers – Details

v2.8.1

Fixed

• Core
  • fix: remove @parcel/utils dep in @parcel/graph – Details
• JavaScript
  • Don't retarget dependencies with * – Details
  • Fix overriding single export of a export * – Details
  • Add mjs and cjs to resolver extensions – Details
• TypeScript
  • Make ts-types transformer work with TS >= 4.8 – Details
• Web manifest
  • Parse shortcut icons in web app manifests – Details
• SVG
  • Fix transformer-svg-react not finding .svgrrc – Details

v2.8.0

Blog post: https://parceljs.org/blog/v2-8-0/

Added

• Core
  • Code splitting across reexports using symbol data by splitting dependencies – Details
  • Update without bundling for non-dependency related changes – Details
  • Improve performance of incremental bundling – Details
  • Only serialize and send shared references to workers that need them – Details
  • Improve performance of HMR by not waiting for packaging – Details
• JavaScript
  • Verify version when resolving Node builtin polyfills – Details
  • Add loadBundleConfig method to Packager plugins – Details
• SVG
  • Generate typescript for SVGs when using svgr and typescript option – Details
• Bundler
  • Move experimental bundler to default – Details

Fixed

• Core
  • Fix verbose warning: reexport all doesn't include default – Details
  • Support multiple edge types in Graph.hasEdge – Details
  • Ensure edge exists before removal in Graph.removeEdge – Details
  • Disable splitting dependencies on symbols for non-scope hoisted bundles – Details
  • Fix TypeScript definitions for Parcel config API – Details
  • Use traverseAssets in packager to improve performance – Details
  • Make uniqueKey undefined by default – Details
  • Catch uncaught promise build abort race – Details
  • Bump parcel dependencies – Details
• JavaScript
  • Bump SWC - Details, Details
  • Fix Chrome Android browserslist support check – Details
  • Fix CommonJS symbol collection without scope hoisting – Details
  • Make React Refresh debounce call on the leading edge – Details
  • Retain correct dependency order between imports and reexports without scopehoisting – Details
• Bundler
  • Consider sibling in available assets to younger sibling for parallel deps – Details
  • Don't merge isolated child assets – Details
  • Do not merge isolated bundles in experimental bundler – Details
  • Implement min bundles configuration – Details
• Dev server
  • Include Content-Length header in HEAD requests – Details
• Vue
  • Fix errors displaying errors when compiling Vue SFCs – Details
  • Add file path to error code frames – Details
  • Fix location of errors – Details
• Image
  • Upgrade sharp – Details
• TypeScript
  • Allow configuring module resolution – Details
• Web extensions
  • Fix service worker packaging in web extensions – Details