On custom element 'link css' does not build css.

[wildwind123]

Related plugins

• plugin-vue

• plugin-vue-jsx

Describe the bug

I write in template link css like this, for web component doc

<template>
  <link rel="stylesheet" href="/src/style.css" />
  <div class="red">
    <h1>red</h1>
  </div>
</template>

this work in dev mode, but does not work after build, css is empty

On documentation web component support external css via link
doc in mozilla

Reproduction

https://stackblitz.com/edit/vitejs-vite-6fypuw?file=src%2Fstyle.css,src%2Fmain.ts,src%2FApp.ce.vue,index.html&terminal=dev

Steps to reproduce

npm install
npm run dev

red text is red

npm run build
npm run preview

red text is black, should be red

System Info

System:
    OS: Linux 6.5 Ubuntu 22.04.3 LTS 22.04.3 LTS (Jammy Jellyfish)
    CPU: (6) x64 Intel(R) Core(TM) i5-8400 CPU @ 2.80GHz
    Memory: 10.35 GB / 15.36 GB
    Container: Yes
    Shell: 5.1.16 - /bin/bash
  Binaries:
    Node: 21.4.0 - /usr/local/bin/node
    npm: 10.2.4 - /usr/local/bin/npm
    pnpm: 8.11.0 - ~/.local/share/pnpm/pnpm
  npmPackages:
    @vitejs/plugin-vue: ^5.0.4 => 5.0.4 
    vite: ^5.2.0 => 5.2.0

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.
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• The provided reproduction is a minimal reproducible example of the bug.

[wildwind123]

I don't know this is bug or not released feature. I create issue in vuejs/core

vuejs/core#10561

[wildwind123]

vuejs/core#10561
found a solution