vite4 lib how to package a vue sfc into one file

[zkisme]

Related plugins

• plugin-vue

• plugin-vue-jsx

Describe the bug

I use this vite config

import vue from '@vitejs/plugin-vue';

// https://vitejs.dev/config/
export default defineConfig({
  plugins: [vue()],
  build: {
    lib: {
      formats: ['es'],
      entry: './src/index.js',
      name: 'xxx',
      fileName: '[name]',
    },
    rollupOptions: {
      external: ['vue'],
      output: {
        preserveModules: true,
      },
    },
  },
});

I want to output HelloWorld.vue to the /components/helloworld.js file.
But got the following files, It contains HelloWorld.vue.js and HelloWorld.vue2.js,
how to comple into one HelloWorld.js file

dist/es/components/HelloWorld.vue2.js
dist/es/_virtual/_plugin-vue_export-helper.js
dist/es/components/HelloWorld.vue.js

Reproduction

https://stackblitz.com/edit/vitejs-vite-zktjzh?file=vite.config.js

Steps to reproduce

npm run build

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: 16.14.2 - /usr/local/bin/node
    Yarn: 1.22.19 - /usr/local/bin/yarn
    npm: 7.17.0 - /usr/local/bin/npm
  npmPackages:
    @vitejs/plugin-vue: ^4.0.0 => 4.0.0 
    vite: ^4.1.4 => 4.1.4

Used Package Manager

npm

Logs

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• 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.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

[andrey-hohlov]

I stuck with the same issue building shared components library.

Also I'm looking for a way to keep css file import in result file.