vite dev incompatible with vercel dev - ?import query param expects JS

[t3dotgg]

Describe the bug

I am unable to use vite with vercel dev CLI command that allows local hosting of vercel serverless functions.

I believe the core issue is that vercel dev eagerly returns source files when they exist, so static assets i.e. /src/image.svg?import will immediately resolve to /src/image.svg. The vite server seems to use the ?import query param to hijack the request and return a small JS file with the asset exported

I'm not sure if the best path is for vercel dev to honor the ?import query param and handoff to vite, or if there should be an option to resolve the static asset URLs directly in vite's dev environment.

Reproduction

• Create a new Vite project with an SVG import
• Push to vercel using vercel CLI (or github)
• Run locally using vercel dev

I have a more detailed breakdown in a discussion on the vercel github:
vercel/vercel#6356

System Info

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

  System:
    OS: macOS 11.4
    CPU: (8) arm64 Apple M1
    Memory: 310.05 MB / 16.00 GB
    Shell: 5.8 - /bin/zsh
  Binaries:
    Node: 15.14.0 - ~/.nvm/versions/node/v15.14.0/bin/node
    Yarn: 1.22.10 - ~/.nvm/versions/node/v15.14.0/bin/yarn
    npm: 7.7.6 - ~/.nvm/versions/node/v15.14.0/bin/npm
    Watchman: 4.9.0 - /opt/homebrew/bin/watchman
  Browsers:
    Chrome: 91.0.4472.101
    Firefox: 88.0
    Safari: 14.1.1

Used package manager: npm

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[Niputi]

mentioned pull request was merged