decorators are not transformed with `useDefineForClassFields: true`

[danielroe]

Related plugins

• [x] plugin-vue

• [ ] plugin-vue-jsx

Describe the bug

When useDefineForClassFields is not explicitly set to false, decorators are not transformed at all within the vue plugin

context: https://discord.com/channels/473401852243869706/1080872789940121732/1340948843486904330

Reproduction

https://stackblitz.com/edit/vitejs-vite-42jy4nh9?file=src/App.vue,tsconfig.json

Steps to reproduce

No response

System Info

System:
    OS: Linux 5.0 undefined
    CPU: (8) x64 Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz
    Memory: 0 Bytes / 0 Bytes
    Shell: 1.0 - /bin/jsh
  Binaries:
    Node: 18.20.3 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 10.2.3 - /usr/local/bin/npm
    pnpm: 8.15.6 - /usr/local/bin/pnpm
  npmPackages:
    @vitejs/plugin-vue: ^5.2.1 => 5.2.1 
    vite: ^6.1.0 => 6.1.0

Used Package Manager

npm

Logs

No response

Validations

• [x] Follow our Code of Conduct
• [x] Read the Contributing Guidelines.
• [x] Read the docs.
• [x] Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• [x] Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to vuejs/core instead.
• [x] Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• [x] The provided reproduction is a minimal reproducible example of the bug.

[edison1105]

duplicate of #430

[TheAlexLichter]

While it might be a duplicate, the main problem isn't solved yet.

A workaround is setting the esbuild target manually (and the problem only affects dev anyway):

  esbuild: {
    target: 'es2020' // Also works with 'es2024'
  },

https://stackblitz.com/edit/vitejs-vite-plugin-vue-528-workaround?file=tsconfig.json,src%2FApp.vue,vite.config.js