NXT-573: Added Vite bundler

[daniel-stoian-lgp]

Checklist

• I have read and understand the contribution guide
• A CHANGELOG entry is included
• I have run automated testing and it is passed
• Documentation was added or is not needed
• This is an API breaking change

Issue Resolved / Feature Added

Added a complete, opt-in Vite bundler path to @enact/cli, alongside webpack.

The Vite path is only reachable via --vite or ENACT_BUNDLER=vite; both bundlers coexist for the duration of the migration.

Depends on the companion @enact/dev-utils PR (NXT-573). config/vite.config.js consumes ViteHtmlPlugin / ViteILibPlugin / ViteWebOSMetaPlugin from it.

Every pack/serve feature is covered:

Files:

• New: config/vite.config.js (the port of webpack.config.js, same factory signature), commands/vite-utils.js, four docs.
• Changed (Vite branch added, webpack untouched): commands/pack.js, commands/serve.js, commands/eject.js.
• Refactor touching webpack: the PostCSS chain moved out of config/webpack.config.js into config/postcss-plugins.js (getPostCssPlugins) so both configs share one copy — same plugin array, same order, no behavior change. This is the only webpack-facing change and the main thing to review.
• Dependencies added: vite, @vitejs/plugin-react, terser, vite-plugin-node-polyfills.

Resolution

Validated end-to-end on real apps: Sandstone (React 18, pre-compiled deps) and Limestone (React 19, ships raw @enact source with JSX-in-.js and ~ npm imports), plus qa-dropdown, the redux sample, and the aggregate all-samples.

Validation was done in a real browser, Eight config issues and eight runtime issues were found and fixed; all are documented with root causes in docs/vite-migration.md.

Additional Considerations

How to test:

cd cli && npm install                 # pulls vite + @vitejs/plugin-react + terser
# from an Enact app dir:
enact serve --vite                    # or ENACT_BUNDLER=vite enact serve
enact pack -p --vite                  # production build
enact pack -p --vite -l en-US,ko-KR   # locale-filtered
enact pack -p -i --vite               # isomorphic

Links

NXT-573

Comments

Enact-DCO-1.0-Signed-off-by: Daniel Stoian (daniel.stoian@lgepartner.com)