Changelog Entry

(No changelog entry for the internal change)

Description

This PR introduces a new private botframework-webchat-base package to centralize shared utilities and types across the Web Chat project. It also updates the build process for all packages to use tsup, as otherwise the reference to the package is included into depending packages by babel.

Design

The new base package serves as a foundation for shared functionality, promoting code reuse and maintainability. The build process changes aim to simplify and standardize the compilation across all packages, reducing complexity and potential inconsistencies.

Limitations

Due to how babel build works, only the packages which are using the new build approach powered by tsup can consume the base and styles packages. This limitation applies only to the packages we're publishing.

Package Status List

• 🚀 base
• 🔒 test/dev-server
• 🔒 test/harness
• 🔒 test/web-server
• ✅ core
• ✅ styles
• 🔒 support/cldr-data-downloader
• 🔒 support/cldr-data
• ✅ api
• 🔒 isomorphic-react
• 🔒 isomorphic-react-dom
• ✅ component
• ⚠️ directlinespeech
• ✅ bundle
• 🔒 test/page-object
• ✅ fluent-theme
• 🔒 test/fluent-bundle

Legend

• 🚀 New package with tsup introduced in this PR
• ✅ Existing package migrated to tsup in this PR
• ⚠️ Package needs update to tsup to use the base package
• 🔒 Private package (not published)

Specific Changes

• Added new packages/base directory with initial setup
• Moved withResolvers utility from core to base package
• Updated package.json files across multiple packages:
  • Added botframework-webchat-base as a development dependency
  • Updated build scripts to use tsup
  • Removed Babel and separate TypeScript compilation steps
• Updated tsconfig.json files to remove emission-related options
• Modified import statements in affected files to use the new base package
• Updated webpack configurations to reflect new build output structure
• Adjusted GitHub Actions workflow to use new build output paths

-

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)