• JavaScript

  • Fix macro location information – Details

• React Server Components Improve performance of RSC builds – Details

This release significantly improves code splitting and tree shaking when scope hoisting is disabled, e.g. when using React Server Components with static rendering. It enables re-exports to be followed when resolving a dependency, so that only used exports from large libraries get bundled together for each page rather than across all pages. This was already the case when using scope hoisting, but now it works without scope hoisting as well.

• JavaScript
  • Code split re-exports when scope hoisting is disabled – Details

• JavaScript
  • Scope macro asset unique keys to the parent asset – Details

• JavaScript

  • Expose line and column number to macros – Details

• React Server Components

  • Invalidate cache in ReactStaticPackager when pages are added or client components change – Details
  • Fix lazy mode with React Server Components – Details
  • Fix @parcel/rsc duplicate types – Details
  • Ensure publicUrl ends with a slash in react-static packager – Details
  • Fix hash reference replacement in react-static packager – Details

• Core

  • Change minimum required glibc version to 2.26 – Details
  • Cache inline bundle packaging – Details
  • Use stable id for package requests – Details

• HTML

  • Do not remove <meta charset="utf-8"> – Details

• MDX

  • Make URL dependencies in MDX files optional – Details

• React Server Components

  • Fix memory leak in react-static packager – Details

• Resolver

  • Fix resolving source package exports condition from self reference – Details

• SVG

  • Update oxvg – Details

• Compressors

  • Use max level compression for brotli compressor – Details

• HTML

  • Fix serializing <template> element contents – Details

• JavaScript

  • Skip optional dependencies in ESM externals – Details

Blog post: https://parceljs.org/blog/v2-15-0/

• Core

  • Distribute Rust binaries for each architecture as separate npm packages – Details

• HTML and SVG

  • Add Rust-based transformer/packager/optimizer for HTML and SVG – Details

• Resolver

  • Support cloudflare: scheme and no longer rewrite node: scheme – Details

• Core

  • Avoid segmentation fault on thread exit on Linux – Details
  • Support older GLIBC versions on Linux – Details

• JavaScript

  • Include all symbols in non-browser entries – Details
  • Update swc and mdx-rs – Details
  • Fix exporting objects with non-configurable prototypes from React Server Components – Details

• Core

  • Fix duplicate bundles error message – Details

• JavaScript

  • Support ESM externals and exports in dev packager – Details
  • Treat Deno's jsr: dependencies as external – Details

• JavaScript
  • Updated to React 19.1, which enables Server Components to be used with stable React instead of only canary – Details

• Core

  • Enable resolving source field in dev dependencies – Details
  • Error when building a library target in serve mode – Details

• JavaScript

  • Fix MDX inline assets in static RSCs – Details
  • Fix symbol collection with multiple exports of same function (e.g. date-fns) – Details

• REPL

  • Fix error overlay resolution in REPL – Details

• create-parcel

  • Fix gitignore in create-parcel – Details
  • Fix create-parcel on windows – Details

• Resolver
  • Fix resolving package self references – Details