TL;DR

Parcel now offers a --no-cors flag to disable CORS (Cross-Origin Resource Sharing) headers, resolving issues when developing applications with cross-origin requests.

Fixes Worth Knowing

• Added a --no-cors flag to the development server to disable CORS headers, which resolves issues with cross-origin requests during development.

TL;DR

Parcel 2 introduces a completely rewritten architecture with improved startup times and support for modern JavaScript features like top-level await.

Breaking

• Configuration files: Parcel now uses a parcel.config.js file (JavaScript configuration file) instead of .parcelrc.
• Plugins: Existing plugins may require updates to be compatible with the new plugin API.

New

• Faster builds: Significant performance improvements, especially for large projects.
• ES Module support: Native support for ES Modules, improving compatibility with modern JavaScript.

Fixes Worth Knowing

• Correctly handles CSS @import statements, resolving issues with styles not being applied.
• Improved error messages for easier debugging.

Before You Upgrade

• Migrate your .parcelrc configuration to a parcel.config.js file.
• Check for plugin compatibility and update as needed.