Preload fails in library mode

[modderme123]

Describe the bug

When in library mode, Vite should disable the preload-helper for dynamic imports. What currently happens is that vite compiles imports that have preloads to

__vitePreload(() => import("./index3.js"), ["/index3.js","/_commonjsHelpers.js","/preload-helper.js"])

However, this is a problem when using a library in app mode which moves the files in the final output. This ends up creating errors because index3.js was renamed to index3.[hash].js, and only the import string was changed:

__vitePreload(() => import('/node_modules/.vite/index3-QK47J4CQ.js?v=2fd9b5df'),"/index3.js", "/_commonjsHelpers.js", "/preload-helper.js"])

So Chrome logs this

preload-helper.js:27 GET http://localhost:3000/index3.js net::ERR_ABORTED 404 (Not Found)

An ideal fix would be to disable preload altogether in library mode such as #3133.

Reproduction

A complicated reproduction is here: https://github.com/solidjs/solid-playground

System Info

Output of npx envinfo --system --npmPackages vite,@vitejs/plugin-vue --binaries --browsers:

  System:
    OS: macOS 10.15.7
    Shell: 3.2.2 - /usr/local/bin/fish
  Binaries:
    Node: 16.2.0 - /usr/local/bin/node
    Yarn: 1.22.10 - /usr/local/bin/yarn
    npm: 7.15.1 - /usr/local/bin/npm
  Browsers:
    Chrome: 91.0.4472.77
    Safari: 14.1.1
  npmPackages:
    vite: ^2.3.6 => 2.3.6 

Used package manager:

---

Before submitting the issue, please make sure you do the following

• 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.
• Provide a description in this issue that describes the bug.
• 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 https://github.com/vuejs/vue-next instead.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.

[patak-dev]

Closed by #4097