Vite minification

[velialiev]

Describe the bug

unplugin-swc disables esbuild when used in Vite.

esbuild will be automatically disabled if you use this plugin.

On the other hand, SWC minification doesn't work in Vite because it already uses esbuild as its minifier.

Use the minify: true option, it only works for Rollup as Vite uses esbuild to minify the code and cannot be changed.

Therefore, both SWC minification and esbuild minification don't work in Vite. Is this the intended behavior? In my minimal reproduction, I demonstrate two builds: one with the default Vite configuration and another with unplugin-swc. Enabling unplugin-swc completely disables minification. The only solution I found is to use Terser, which works correctly because unplugin-swc doesn't affect it's configuration.

Reproduction

https://github.com/velialiev/vite-swc-minification

System Info

System:
    OS: macOS 15.2
    CPU: (10) arm64 Apple M1 Pro
    Memory: 72.06 MB / 32.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 22.13.1 - ~/.nvm/versions/node/v22.13.1/bin/node
    npm: 10.9.2 - ~/.nvm/versions/node/v22.13.1/bin/npm
    pnpm: 10.7.0 - ~/Library/pnpm/pnpm
    bun: 1.2.8 - ~/.bun/bin/bun
  Browsers:
    Chrome: 138.0.7204.93
    Safari: 18.2

Used Package Manager

pnpm

Validations

• Follow our Code of Conduct
• Read the Contributing Guide.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A, please open a GitHub Discussion instead.
• The provided reproduction is a minimal reproducible of the bug.

[hannoeru]

Confirmed on current Vite 7: the plugin disables Vite's esbuild transform, which also disables Vite's default esbuild minification path. Removing that setting would re-enable source transforms and can change SWC-specific JSX, decorator, and target behavior. This needs a deliberate Vite-minifier design and end-to-end coverage, so we will not ship an unsafe one-line change.