Failed to load relative external URL from HTML

[leonheess]

Describe the bug

I have relative URLs in my index.html. They are marked as external. Still, Vite using the vite command says

Failed to load url /xxx (resolved id: /xxx). Does the file exist?

There is already a separate issue that URLs which are marked as external are rewritten at all: #11017

Reproduction

https://stackblitz.com/edit/vitejs-vite-gvcugb

Steps to reproduce

1. Open Stackblitz
2. Run command vite
3. Observe Failed to load url /modules/module1 (resolved id: /modules/module1). Does the file exist?

System Info

System:
    OS: Windows 10 10.0.19044
    CPU: (16) x64 11th Gen Intel(R) Core(TM) i9-11950H @ 2.60GHz
    Memory: 103.00 GB / 127.21 GB
  Binaries:
    Node: 18.14.2 - ~\AppData\Local\Volta\tools\image\node\18.14.2\node.EXE
    Yarn: 1.22.19 - ~\AppData\Local\Volta\tools\image\yarn\1.22.19\bin\yarn.CMD
    npm: 9.5.0 - ~\AppData\Local\Volta\tools\image\node\18.14.2\npm.CMD
  Browsers:
    Edge: Spartan (44.19041.1266.0), Chromium (112.0.1722.48)
    Internet Explorer: 11.0.19041.1566
  npmPackages:
    @vitejs/plugin-vue: ^4.2.1 => 4.2.1
    vite: ^4.3.5 => 4.3.5

Used Package Manager

pnpm

[stackblitz]

Start a new pull request in StackBlitz Codeflow.

• vitejs-vite-gvcugb (Open reproduction)

[sapphi-red]

Duplicate of #12711

[leonheess]

How is that a valid duplicate? It should never even ty to resolve relative URLs during build...

[patak-dev]

We don't yet have an option for external URLs that are respected in both dev and build. We're planning to add this feature soon. See #11854 (comment) and #6582.